Questions Asked on
March 16, 2011

math
Suppose that 25% of all wise people are nice and half of all the nice people are wise. Suppose further that 25% of all the people are neither wise nor nice. What percent of all the people are both wise and nice?
asked by Janice 
Chemistry
Why does the voltage increase when ammonia is added to a Cu2+ cell??
asked by Anonymous 
calculus
I solved this problem, can someone check it to make sure I did it right. There are two parts to this intrepation and estimate of the value. Let C(t) be the total value of the US currency (coins and banknotes) in circulation at time, t. The table gives
asked by Janet 
chemessty
What is the freezing point of an aqueous solution of 10.0 g of glucose (C6H12O6) in 50.0g H2O? (kf=1.86 C/m)
asked by bill 
Math
1.)Suppose you interview 10 randomly selected workers and ask how many miles they commute to work. You'll compute the sample mean commute distance. Now imagine repeating the survey many, many times, each time recording a different sample mean commute
asked by Elie 
Calculus (pleas help!!!)
A) If x^2+y^3−xy^2=5, find dy/dx in terms of x and y. dy/dx=________ B) Using your answer for dy/dx, fill in the following table of approximate yvalues of points on the curve near x=1 y=2. 0.96 ______ 0.98 ______ 1.02 ______ 1.04 ______ C) Finally, find
asked by Catherine 
chemistry
The combustion of propane (C3H8)produces CO2 and H20: C3H8(g)+5O2(g) 3CO2(g)+4H2O(g) Calculate the mass, in grams, of H2O that will be produced if 2.5 mol of O2 is consumed.
asked by michelle 
math
There are 10 girls and 6 boys in a class. The teacher randomly draws one student's name and then draws another. What is the probability that the first name drawn will be a boy and the second will be a girl?
asked by ISAAC 
Statistics
According to a recent survey, 75% of all customers will return to the same grocery store. Suppose 8 customers are selected at random: A) What is the probability that exactly five of the customers will return? B) What is the profability that all 8 will
asked by Maria B 
writing
papers that are inadequately developed often contain repetition and wordy generalities
asked by lisa 
Physics
One 2.5 kg paint bucket is hanging by a massless cord from another 2.5 kg paint bucket, also hanging by a massless cord, as shown in Fig. 444. (a) If the buckets are at rest, what is the tension in each cord? (lower cord)________ N (upper cord)________ N
asked by Shanniganz 
Math
Let Pn=0,1,2....be the probability that an automobile policyholder will file for n claims in a fiveyear period. The Actuary involved make the assumption that Pn+1=(1/4)Pn. What is the probability that the holder will file two or more claims during this
asked by Roxy 
chemistry
Would you use a physical model or a conceptual model to describe the following: a gold coin, dollar bill, car engine, air pollution, virus, spread of sexually transmitted disease?
asked by helen 
chemistry
What concentration of the barium ion,Ba^2+ ,must be exceeded to precipitate BaF2 from a solution that is 1.00*10^2M in the fluoride ion,F? Ksp for barium fluoride is 2.45*10^5.
asked by roshan 
Physics
a driver of a car going 95.0km/h suddenly sees the lights of a barrier 35.0 m aheadd. It takes the driver 95 s before he applies the breaks, and the average acceleraion during breaking is 10.om/s/s does the car hit the barrier?
asked by Jerry 
Math
The Table shows some common scales used in a model railroading.For each scale,find the length of a model of an 82foot long boxcar.Give the length of each model in inches. Scale Name/Scale N 1:160, S 1:64, O 1:48
asked by Alexis 
UNP
Find the amount of heat required to convert 10g of ice to steam at 110 degree Celsius.
asked by Dangadang 
Stats (probability)
Of 10 girls in a class, 3 have blue eyes. If two girls are chosen at random, what is the probability that (i) both have blue eyes, (ii) neither has blue eyes, (iii) at least one has blue eyes? I have the answers but do not know how to get them. I'm trying
asked by Morgan 
Chemistry
Use the chemical reaction below to answer the questions that follow. CuO(s) + H2(g) → Cu(s) + H2O(g) a. What is the limiting reactant when 19.9 g CuO react with 2.02 g H2? b. The actual yield of copper was 15.0 g. What is the percentage yield? c. How
asked by Kayla 
chemistry
The combustion of propane (C3H8)produces CO2 and H20: C3H8(g)+5O2(g) 3CO2(g)+4H2O(g) Calculate the mass, in grams, of H2O that will be produced if 2.5 mol of O2 is consumed.
asked by michelle 
math
six students of different heights are going to march in a single file in a parade carrying flags. the order in which they march is to be randomly selected. what is the probability that they will march in order of height from shortest to tallest. can you
asked by anonymous 
chemistry
a 2.500g sample of an unknown compound containing only C, H and O was burned in O2. The products were 4.776g of CO2 and 2.934g of H2O. a) what is the percent compostion of the original compound? %C %H %O and what is empirical formual of compound?
asked by Tc 
Algebra
Is 3x4y=7 a direct variation Is 6x3y=0 a direct variation?
asked by Dana 
Spanish (double check my work please)
Choose the sentence in which the "" word is grammatically correct. A. Esta varilla negra "está" parada sobre otra cosa negra. B. Esta varilla negra "esta" parada sobre otra cosa negra. C. Esta varilla negra "es" parada sobre otra cosa negra.
asked by anon 
physics
in a making a graph showing the stretch of a spring: Plot a graph of force vs. stretch. Find the slope. The Slope of the graph is called the spring constant. 1)What does the slope of the graph tell you? 2) If someone had a graph with a slope twice as steep
asked by Kriti 
Physics
Two balls, each with a mass of 0.819 kg, exert a gravitational force of 8.76 × 10^−11 N on each other. How far apart are the balls? The value of the universal gravitational constant is 6.673 × 10−11 Nm2/kg2. Answer in units of m.
asked by Kevin 
physics
The Earth exerts an 680 N gravitational force on a man. What force does the man exert on the Earth? Answer in units of N
asked by Anonymous 
Physics please help!!
Suppose you pour water into a container until it reaches a depth of 30.2 cm. Next, you carefully pour in a 14.8 cm thickness of olive oil so that it floats on top of the water. What is the pressure at the bottom of the container? Assume 1000 kg/m3 and 901
asked by Megan 
Spanish
Because underline doesn't show I will replace the underline with parentheses. I hope it's less confusing. 6. Choose the sentence in which the underlined word is grammatically correct. A. Esta varilla negra (está) parada sobre otra cosa negra. B. Esta
asked by anon 
Calculus
Let y(x)=ln(cosh(x)+ sqrt(cosh^2(x)−1)) Find the derivative Dxy= I don't know what to do with this...
asked by Patrick 
chemistry
CALCULATE THE NUMBERS OF MOLES OF POTASSIUM CHLORATE THAT MUST DECOMPOSE TO PRODUCE POTASSIUM CHLORIDE AND 1.80 MOLES OF GLYCOGEN GAS
asked by ALEX 
Physics
A 2.20 kg block is in equilibrium on an incline of 37.3 degrees. The acceleration of gravity is 9.81 m/s2 . What is Fn of the incline on the block? Answer in units of N.
asked by Hugh 
Math
Twenty (20) glibs are worth $3 while 7 glubs are 1 cent more than 6 glibs. How much is 1 glub worth?
asked by AD 
Algebra 2
Solve the following equation for the variable x. (4/x2)+(3/x+2)=(3x/x^24) Thank you very much for your help.
asked by Esther 
microeconomics
among monopoly, oligopoly, monopolistic competition, and perfect competion, how would you classify the markets for each of the following drinks?
asked by eva 
chemistry
A bearthing mixture used by deepsea divers contains helium, oxygen, and carbon dioxide. What is the partial pressure of oxygen at 1.2 atm if PHe = 0.98 atm and PCO2 = 0.04 atm? a) 1.02 atm b) 0.12 atm c) 0.94 atm d) 0.18 atm
asked by Logan 
chemistry
400cm3 of nitrogen at 30degree celsius is heated at constant pressure to a temperature 50degree celcius.find the new volume of the nitrogen.
asked by peter onoriode 
physics
Two forces acting on a body in opposite directions,have the resultant velocities of 10newton. if they act at right angles to each other, the resultant is 50 newton.find the two forces.
asked by Abhishek 
Please Please HelpPhysics
I am having trouble figuring out this question: Part 1: A long staight wire carries a current due East. This wire creates, at point #1, a magnetic field that is derected at 40 deg below due South. From point #1, the wire is located: 50 deg below due North
asked by Sonia 
chemistry
calculate the volume of 3M HCl needed to change the pH of 50 mL of the undiluted buffer solution by one pH unit?
asked by Anonymous 
chemistry
What has the lowest surface tension and why? CH3CH2CH2CH3, (CH3)2CO, C6H6, H20
asked by Branden 
Math
Convert these unlike fractions to equivalent like fractions and add them. You must use the LCD to get the answer correct. If possible, reduce the final sum. 1/7 = ?/? + 3/14 = ?/? __________ ?  ??
asked by Angel 
arithmetic
One chicken lays an egg every 2 days, another every 3 days and a third chicken lays an egg every 5 days. They all lay an egg today. How many days in the next 101 days will EXACTLY 2 chickens be laying an egg?
asked by AD 
URGENT! chemistry percentage yield
heating an ore of antimony sulfide in the presence of iron gives th element antimony and iron(2) sulfide. when 15.0 antimony sulfide reacts with an excess of iron, 9.84 g antimony is produced. what is the percent yield of this reaction?
asked by sheynah 
algebra
the formula r= 0.075t + 3.85 can be used to predict the world record for the 1500 meter run, t years after 1930.find an inequality that identifies the years in which the world record will be less than 2.8 minutes
asked by andy 
Math
A rectangular tub with dimensions 2m x 1m x 0.5m is filled with water using a pail of radius 0.1 m and height 0.35 m. How many pails of water will be required? Give your answer to the nearest whole pail.
asked by Anonymous 
geometry
Find the length of the median of a trapezoid with vertices at C(3,1) D(10,1) E(7,9) and F(5,9)
asked by Clara 
UNP
HOW MANY CALORIES ARE REQUIRED TO HEAT OF EACH OF THE FOLLOWING FROM 15 DEGREE CELSIUS TO 65 DEGREE CELSIUS? A. 30 G OF Aluminum b. 20 g of platinum c. 35 g of water
asked by Dangadang 
stats
Three scholarships are available for needy students. Their values are $2,00, $2,400 and $3,000 12 students have applied and no student may receive more than one scholarship. Assuming all 12 students are in need of funds, how many different ways could the
asked by Maria B 
Algebra II
Hooker's law. The distance d when a spring is stretched by a hanging object varies directly as the weight w of the object. If the distance is 39cm when the weight is 3kg, what is the distance when the weight is 9kg? Thank you, before hand.
asked by Esther 
math
write an equation that is parallel to: y=6x71 perpendicular to y=5x69
asked by I.p.k. 
5th grade math
name three solutions of inequality. then graph the inequality on a number line. k
asked by casey 
social studies
it say to briefly describe the events that followed the Confederate defeat at Gettysburg. (civil war). first is followed meaning before or after. and what does it mean by describe the events?
asked by katie 
chemistry
400cm3 of nitrogen at 30degree celsius is heated at constant pressure to a temperature 50degree celcius.find the new volume of the nitrogen.
asked by pete onoriode 
English
Help me write an essay on How I learned English by Gregory Djanikian.
asked by Sandra 
stats
The basketball coach of Xyz College is quite concerned about their 40 straight losses. The frustrated coach decided to select the starting lineup for a game by drawing 5 names from the 12 available players at random. How many different starting lineups are
asked by Maria B 
physics
Jack, jill and spot go out for a picnic at the side of the river. jack takes spot for a jog. jack and spot are on the wast bank of the 30m wide river when jill is on the east side. the rivers current is 0.75m/s south. a) spot jumps into the river and swims
asked by Ty 
math
The concentration ,in micrograms per milliliter of the antibiotic chloramphenicol is given by 8t^2 2t^3, in which t is the number of hours after the drug is taken. Factor the polynomial.
asked by Anonymous 
Math(Probability)
**Describe the outcome space** (a)If a Families that have three children each and select one such family at random. Describe the sample space S in terms of their children as 3tuple, agreeing for example that "gbb" would indicate that the youngest is a
asked by Melissa 
Physics
A car accelerates at a constant rate from 13m/s to 25m/s in 6.0seconds. What was its acceleration? How far did it travel in this time?
asked by Emily Grossman 
English
The Introduction by Anne Finch Did I, my lines intend for public view, How many censures, would their faults pursue, Some would, because such words they do affect, Cry they're insipid, empty, uncorrect. And many, have attained, dull and untaught The name
asked by anthony 
AP Human Geography
How do a country's size and shape affect its power and stability?
asked by Kerri 
trip
for sin2x+cosx=0, use doubleangle or halfangle formula to simplify the equation and then find all solutions of the equation in the interval (0,2Pie)
asked by bob 
maths
the perimetre of the rohmbus is 52cm and one of its diagnol is 10 cm find the length of the other diognol and the area of the rohmbus
asked by sanjna 
MATH
A track meet awards 6, 5, 4, 3, 2 and 1 points for 1st, 2nd, 3rd, 4th, 5th and 6th places, respectively. Team A’s only two runners originally earned 6 points in the ﬁrst race with both runners ﬁnishing in the top 6, but then the winner of the ﬁrst
asked by ABC123DoReMi 
math
convert 5040 cubic inches to cubic feet
asked by stanly 
microeconomics
among monopoly, oligopoly, monopolistic competition, and perfect competion, how would you classify the markets for each of the following drinks? a. tap water b. bottled water c. cola d. beer
asked by eva 
anonymous
what is the balance equation if lactic acid is added with sodium biacarbonate and potassium bicarbonate
asked by Anonymous 
computer science
I need to see if someone can help me with a c# programming problem Create a class called employees that includes three pieces of information as either instance variables or automatic properties  a first name(type string), a last name (type string) and a
asked by Latifu 
physics
1)If I am to plot a graph of Force in Newtons vs. Stretch in meters, would the x axis be force or the stretch? 2) The data table has 3 columns: force in Newtons, position in m and displacement in m. Which one is used to plot the Stretch in meters? the
asked by Sushmitha 
chemistry
These are short and simple. :) I've included my answers, tell me if I am wrong please. CH3 is attached to a carbon on a pentane ring. Is the hybridization of the carbon sp3? NH connects a benzene ring to two benzene rings. Is the hybridization of the
asked by s 
algebra
Rachael bought 12 pencils and 7 markers for $5.36, and later bought 8 pencils and 5 markers for $3.68. Find the cost of each pencil and marker.
asked by cody 
physical science
What is the acceleration of a girl on a skateboard if the The unbalanced forward force on the boy is 15 N? The total mass of the boy and skateboard is 58 kg.
asked by Ariel 
psychology
how a t Test for a dependent variable can be of great value in applying a new approach to the treatment of aggressive behavior to a small group of students. Why would this t Test be preferred to using another test statistic?
asked by Anonymous 
Evolutionary Science
I'm reading this article and I'm having difficulty understanding some of the terminology. It says the following: "We show that endometrial PRL expression is a derived feature of placental mammals and that the episode of positive selection in HoxA11
asked by Lena 
chemistry
What is the total amount of heart absorbed by 100.0 grams of water when the temperature of the water is increased from 30.0 degrees Celcius to 45.0 degrees Celcius?
asked by Kristina 
calculus
A 20 ft ladder is leaning against the side of a house. If the bottom of the ladder is moving away from the house at the rate of 2 feet per second, how fast is the top of the ladder moving down the wall when the bottom of the ladder is 12 feet from the
asked by Diana 
science
mr.johnson body has 40 liters of water according to his weight. how much does he weigh
asked by jeylan 
algebra II
Using the given equations, find the point of intersection. 6x  2y = 5 and 3x  y = 10
asked by benjamin 
Math
The scale 1 in 120ft was created a 169.3 tall model of Alaska's Mount McKinely.Estimate the height of Mount McKinley from the height of the model.
asked by Alexis 
ENGLISH GRAMMAR
KINDLY PPLEASE TO CORRECT IN GOOD GRAMMAER MY ANSWER TO THE QUSTION. CAN YOU HELP TO CREATE GOOD ANSWER. THANK YOU Q.HOES DOES MARKETING INFLUENCE US DAILY AS CONSUMER. ANSWER.MARKETING INFLUENCE US DAILY AS CONSUMER SINCE THE MANUFACTURER AND SERVICES
asked by jessie 
USSO
Please explain why the British Colonists in North America sought separation from the British Empire in1776. Explain not only the events that led up to the Revolution but the ideas that the colonists used to interpret these events and how they ultimately
asked by Karen 
Math
There are 4 stop signs at an intersection. Car A arrives there first, then B one second later, C one second after B, and D one second after C. Earch car waits 3 seconds after stopping to move again. There are ________ seconds from the time that Car A first
asked by AD 
CalcuslusCalculusCalculus
A rocket arises from its launching pad with a velocity given. By 0.1 h m/s ,where h m is the height reached by the rocket at that time.the rocket is obserrvved from 2000 m away from the launch pad.at. What rate is the distance of the roocket from observer
asked by Mehak 
Physics
A child rides a toboggan down a hill that descends at an angle of 11.5 degrees to the horizontal. The hill is 36.6 m long. What is the horizontal component of the child’s displacement? Answer in units of m. What is the vertical component of the child’s
asked by Jonathan 
math
are these parallel, perpendicular, or neither? y=3x4 and y=3x11 y=3x4 and y=3x11 y=(2/3)x4 and y=(3/2)x11
asked by I.p.k. 
calculus
Find the first and second derivative  simplify your answer. y=x/4x+1 I solved the first derivative and got 1/(4x+1)^2 Not sure if I did the first derivative right and not sure how to do the second derivative.
asked by Janet 
chemistry
300.0 g of ammonia react with 36.0 moles of sulfuric acid to produce ammonium sulfate. How many moles of excess sulfuric acid are left over after the reaction is complete?
asked by caitlin 
English
Thank you very much for your help. Here are some more sentences I'd like you to check. (I included four sentences on how to make wine) 1)This wine is made from Nebbiolo grapes, grown exclusively on the slopes (vineyards?) of these hills. 2)These veneyards
asked by Mike 
chemistry
A car tyre pump in the morning at 10degree celcius to a pressure of 0.20NM/S increases in pressure at it's temperature rises.if the temp. reachs 18degree celcius,what is the pressure
asked by pete onoriode 
math
In Geometric progression the sum of first of three terms is 28 and the product is 512 find those numbers
asked by Dhanalakshmi 
math
Use the five steps for problem solving to answer the following question. Please show all of your work. The volume of a rectangular box is limited to 1100 cu. in. If the height is 8 inches and the width is 10 inches how long can the box be?
asked by Anonymous 
algebra 2
The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car travelling 70mph can stop in 270ft, how many feet will it take the same car to stop when it is travelling 60mph? Thank you.
asked by estherw 
physics
Two electrostatic point charges of +50.0 μC and +50.0 μC exert a repulsive force on each other of 197 N. What is the distance between the two charges? The Coulomb constant is 8.98755 × 109 N · m2/C2. Answer in units of m.
asked by maria 
physics
If an auto weighing 13,345 N causes a bridge to sag 0.0254 m, a truck weighing 26,690 N would cause the bridge to sag how many meters, assuming the truck was on the same spot as the auto had been? How do I even set this up?
asked by Nilan 
statistics
Suppose 10 undergraduate students are selected randomly to be interviewed about credit card usage. Is the selection of 10 studets a binomial experiment? Explain.
asked by Shane 
math
Which statistical measure would you use if an outlier is present (mean, median, mode, or rang)? Explain.
asked by Destiny 
maths
Hi Can anyone help please: Suppose that the births of boys and girls can be modelled by rollling a fair die with 27 faces, 14 of which represent a boy and 13 represent a girl. 1. Using this model, choose the option that is closest to the probability that a
asked by Claire 
History
I am totally stumped. The picture we are to look at is called Five generations of slaves in South Carolina. The picture shows a family outside their home. The questions we are asked is to 1make inferences about the owner of the plantation that is showin
asked by m 
MATH
Differential equations, initial value problem. The general equation of motion is: mx"+Bx'+kx=f(t), where the independent variable is t, and the displacement x is the dependent variable. In this case, external force f(t)=0, so mx"+Bx'+kx=0 substitute
asked by Anonymous 
Physics
A bicycle chain is wrapped around a rear sprocket (r = 0.037 m) and a front sprocket (r = 0.06 m). The chain moves with a speed of 1.2 m/s around the sprockets, while the bike moves at a constant velocity. Find the magnitude of the acceleration of a chain
asked by Shanniganz 
chem
gold hasa density of 19 g/cm^3 if an 18 inch necklace is made of pure gold how much would it weigh in grams if it is 1 cm wide and 1 mm thick
asked by hillary 
Macroeconomics
How do you calculate the nominal GDP and the real GDP of something? I know the formula for GDP is y=c+I+G+NX but in a problem like an economy produced this many of good#1 and this many of good#2 last year. The price of each good #1 was $8 last year, and
asked by y912f 
ashy
I've got a question. how do i solve this p(t)=2525e^3(1)
asked by math 
physics
A satellite circling the earth has an average power consumption of 370.0 W. Assuming 5.4% efficiency for conversion of solar energy to electrical energy, what area is required for the solar panels?
asked by lyla 
chemistry
These are short and simple. :) I've included my answers, tell me if I am wrong please. CH3 is attached to a carbon on a pentane ring. Is the hybridization of the carbon sp3? NH connects a benzene ring to two benzene rings. Is the hybridization of the
asked by s 
College English
In the novel, Push by Sapphire, how does Precious' repressed memories affect her? How it manifest?
asked by Ann 
Science
Marlene's car won't start. She wonders if the car is out of gas. She checks the gas gauge and sees that the car has gas. Then she wonders if the battery is dead. She checks the battery and discovers that it is dead. Whish stage of the scientific method is
asked by Olvia 
English
What does it mean when your teacher asks you "identify" the climax of a novel?
asked by Becca 
Chemistry
what is the equation for the reaction of Cu(NH3)subscript2(SO4) with NaOH?
asked by dave 
math
Juan and Pete are on the same salary. Juan receives a 10% raise followed by an 8% raise a year later. Pete receives an 8% raise followed by a 10% raise a year later. After the two salary raises, whose salary is higher? Explain your answer.
asked by anonymous 
Business Law Environment
The three main types of business organizations are partnerships, LLCs and corporations. Using the text and the comments to this chapter provide the following information. a. Describe the formation process for each – formal, informal, etc.? b. Describe
asked by Crystal 
physics
What happens to the gravitational energy of a firefighter when he slides down the fire poles?
asked by Sam 
Religion
Hi there! I'm having trouble understanding this: "Clearly define the term Eucenism, including the four key elements"  My teacher said that the four elements are unity of faith unity oin sacramental life unity of Mission. What's the third one and ...i just
asked by Shivi 
Government
Which is a joint committee? A. a select committee B. a conference committee C. a standing committee D. a committee of the whole B
asked by Alicia 
calculus
find f'(x) for the following: f(x)= cos^5(4x19) I keep getting 20cos^4(4x19)sin, but the answer is supposed to be 20cos^4(4x19)sin(4x19). I can't seem to get there with derivatives
asked by redgy 
statistics
A deli bar offers a special sandwich for which there is a choice of five different cheeses, four different meat selections, and three different rolls. How many different sandwich combinations are possible?
asked by Maria B 
business law
VONAGE HOLDINGS CORPORATION, PETITIONER v. FEDERAL COMMUNICATIONS COMMISSION AND UNITED STATES OF AMERICA, RESPONDENTS, VERIZON COMMUNICATIONS INC., ET AL., INTERVENORS I want you tell me what is going on in that case – use your own words, not the legal
asked by Crystal 
Politics
Why was it necessary to remove Hosni Mubarak as the president of Egypt?
asked by Lily 
MATH
A STORE SELLS A GRAB BAG OF THREE TRAVEL SIZE GAMES. A BAG CONTAINS ONE OF THE FOLLOWING BOOKS:A BOOK OF CROSSWORD PUZZLES, A BOOK OF WORD SEARCHES, OR A BOOK OF WORD SCRAMBLES. THE BAG ALSO CONTAINS A CHECKERS GAME OR A CHESS GAME AND ONE OF THE FOLLOWING
asked by MARLEN 
chemistry
How many atoms are in 3.93 mol of O2? I did the following but did not get the right answer. 3.93 mol O2 X 6.022x10^23/1 mol O2
asked by teena 
math
What are some suggestions teachers can give to parents so that they might assist their children with unfamiliar math concepts?
asked by Anonymous 
algebra
eq1 y = 2x + 3 eq2 y = 1x + 2 What is the solution for eq1 and eq 2? Remember we are looking for the "common" x and y pairs that solve BOTH equations. Are any of the following (x,y) pairs a solution to the above systems of equations? (2, 4) ? (1, 1) ?
asked by bianca, pleeease help i'm lost 
CALCULUS
find f'(x) for f(x) = x/(sqrtx^2+1) please show all the steps. I'm realy confused on this one. I get as far as setting it up using the quotient rule then I go blank. thanks
asked by redgy 
Chemistry
what is the Molecular equation for the preparation of tetraaminocopper(II)sulfate hydrate  Cu(NH3)4SO4*H20 in the experiment CuSO4*5H20 was added to water and then ammonia solution was added to that. and then after that was all stirred up nicely 95%
asked by chris 
UNP
hOW MUCH HEAT MUST BE REMOVED FROM 200 G OF WATER AT 30 DEGREE CELSIUS TO COOL IT TO 0 DEGREE CELSIUS?
asked by Dangadang 
Com II
I Would like someone to proofread what I have wrote as a double check I did not miss anything and that it makes sence. Thanks in advance... Here is the question I had to answer. Review the information about thesis statements in the Center for Writing
asked by Jim 
math
Arrange the fractions in ascending order. Or, if the fractions are equivalent, answer "Equivalent". 7/22,2/5,9/24
asked by anonymous 
math
Roberto is an employee of a store and receives 20% discount off all items in the store. During a sale, the price of a jacket is reduced by $15. Roberto will receive both his 20% discount and the $15 off. Which is better for Roberto, to take the 20%
asked by anonymous 
maths
algebra 1b solve y^2+10y+25=121?
asked by eyeda 
Physics
If a pointer on a spring scale moves 0.0254 m when a 2.224 N weight is fastened to the hook, the pointer will move how many m when a 17.79 N weight is used?
asked by Sejul 
psycology
If psychological needs have presumptive brain or physiological correlates, are they still psychological needs? Why or why not?
asked by lisa 
math
isosceles trapezoid with a perimeter of 52 yards the measure of one base is 10 yards greater than the other base the measure of each leg is 3 yards less than twice the length of the shorter base
asked by Veridiana 
Phys 2
I am having trouble figuring out this question: Part 1: A long staight wire carries a current due East. This wire creates, at point #1, a magnetic field that is derected at 40 deg below due South. From point #1, the wire is located: 50 deg below due North
asked by Sonia 
calculus
The troough down the center of the ccattle barn is 40 cm wwide at thhe top and 20 cm at the botttom .it is 30 cm deep and 8 m long . It iis filled at a rate of 10 dm3/min. What is the rate of rise of water level . I tried it and me ans is pretty close but
asked by Mehak 
physics
if two cups of tea one at 80 degrees and one at 50 d are placed in a cold room what one would get to room temp first and why won't they fall to 0 d i think q1 is 50 d am i right thanks so much
asked by lauren 
physics
if two cups of tea one at 80 degrees and one at 50 d are placed in a cold room what one would get to room temp first and why won't they fall to 0 d i think q1 is 50 d am i right thanks so much
asked by lauren 
Maths
A television set is on sale for $780 cash, or 25% deposit and $85 per month for 8 months. How much can be saved by paying cash? How much is charged in interest? Calculate the annual rate of simple interest charged? Working out please:)
asked by Janet 
math
Without calculating, comment on the statement 2 ∙ 24 ‚ 3 ∙ 23 An electrician needs 766 feet of 12gauge wire to do a wiring job. He has 140 feet of 12gauge wire in stock. How much more wire does he need
asked by Nicole 
chemistry
How do you compute the rate of effusion of one gas compared to another, like Neon to CBr4?
asked by Suzanne 
trig
The number of a fraction is three more than twice the denominator. The fraction simplified is equal to 9/4 Find the fraction
asked by Cynthia 
English
Quick Question: When TYPING an essay, how do represent a song and a picture book...do we quote marks, bold or italics? AND Wiesel choose to write about his time during the Holocaust in order to educate the audience – people aged 15 and above – so that
asked by <arina 
Maths
Kate borrowed $19500 to buy a car. She paid the money back, plus interest in equal monthly repayments of $370 for the next 5 years How much did she pay in interest? Working out please :)
asked by HEYME 
physics 20
Jack, jill and spot go out for a picnic at the side of the river. jack takes spot for a jog. jack and spot are on the wast bank of the 30m wide river when jill is on the east side. the rivers current is 0.75m/s south. a) spot jumps into the river and swims
asked by Ty 
Physics
I am having trouble figuring out this question: Part 1: A long staight wire carries a current due East. This wire creates, at point #1, a magnetic field that is derected at 40 deg below due South. From point #1, the wire is located: 50 deg below due North
asked by Sonia 
Precalc
How do adjM work?
asked by Tory 
business
Assume that you are part of the management team of Nordstrom’s department store. The retail industry and Nordstrom’s is under a great deal of pressure due to the state of the economy. Research the retail clothing industry and Nordstrom’s in
asked by Anonymous 
english
The main antagonist to the other characters within the story is?
asked by Thunder on Sycamore Street 
marketing
please is anyone can help me to give anexample for this firm. what does this mean.which is in mareting subject. goal oriented firm ,,give an example
asked by jessie 
chemistry
could someone explain the fundamentals of titration please
asked by "anonymous" 
Racial and ethnic groups
Identify and describe which, if any, of the following creation and consequence situations native americans has faced, Creation: migration, annexation, or colonization Consequences: extermination, expulsion, secession, segregation, fusion, or assimilation
asked by Nicole 
finance
What makes up a company's capital structure? Explain the purpose of determining the weighted average cost of capital for a company.
asked by lisa 
MATH PROOFS
PROVE: P(( union )[i=1]^(k))=(∑)P(A[i]^ ) ∀ A[i]^ such that (A[i]^ intersect A[]j = ∅ ∀i j) ∀k
asked by Athena 
math
Blockbust video collected data to figure out how many movies they were renting per month. After 5 months, the store wanted to analyze their data to find diffrent statistical measures. Data: Month Movies Rented 1 523 2 625 3 550 4 604 5 864 outlier: 864
asked by Destiny 
chemistry
How do you know when to out a chemical formula in aqueous form? please help me....
asked by bob 
math
marty ate one fourth of hiis pizza and luis ate one third of his pizza. marty ate more more pizza than luis. how is that possible?
asked by Anonymous 
unp
How much thermal energy will flow per hour through a copper rod 5.00 cm in diameter and 1.50 m long, if one end of the rod is maintained at a temperature of 22.5 degree Celsius and the other end at 20.0 degree Celsius?
asked by Dangadang 
algebra 11
Solve the following for the variable x. 4/X2+3/X+2=3X/X^24 thank you.
asked by estherw 
chemistry
why does a solution of ammonium acetate has a pH=7.5
asked by jack 
algebra
R "3" T "7"/ T "5" the quotes mean it is an exponent thx,
asked by popcorn 
Algebra 2
The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car travelling 70mph can stop in 270ft, how many feet will it take the same car to stop when it is travelling 60mph? Thank you.
asked by Esther 
5th grade math
please show how to get the answer... w>2 d+64
asked by casey 
Writing
I need help on adding voice to my writing. I need help on not being repetitive and making my sentences vague. Would you grade me out of 12 points? A valuable item is something that is given to you by a special someone, something that you will have forever
asked by Ramona 
math
7x^220x=3
asked by maddie 
Chemistry
I know the first two answers but I am stumped on the treatments and how they work chemically. A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session,
asked by Celest 
marketing
please can you help to give idea or answer for this homework in marketing subject, how does marketing influence us daily as consumer.
asked by jessie 
ENGLISH
PLEASE CORRECT MY ANSWER IF IT IS CORRECT AND RELEVANT TO THE QUESYION. Q.HOW DOES MARKETING INFLUENCE US DAILY AS CONSUMER? ANSWER. MARKETING INFLUENCE US DAILY IN ORDER TO BUY OUR DAILY NEEDS,PERSONAL USE AND FAMILY USED DUE TO THAT PRACTICE MANUFACTURER
asked by jessie 
Calculus AB
Please help!!! Given the equations Y=√x, y=3 and x=0 1.) find the volume that is formed by rotating the shaded region about the line y=4 2.) find the volume that is formed by rotating the shaded region about the line x=6 I have a test on this tomorrow
asked by Hannah 
math
dans cette figure on compte 8 triangle.Ã‰cris le nom de chacun d'eux.
asked by ALISON 
Improving Your Writing
BACKGROUND: Ten years ago, I started working as a clerk for DMD Medical Supplies. Six months ago, Liz, the human resources director, promoted me to office manager. I manage two employees: Jack and Ruth. My office provides secretarial support for the four
asked by Jennifer 
Europe
what are the 5 themes of geography in france and the answer for each?
asked by lauren 
Culture divercity
Describe as if you were a member of subordinate
asked by Nicole 
chemistry
in stoichiometry, after you have balanced the formula, how do you know which substance is the one you use to convert all 4 times to get the wanted reults
asked by "anonymous" 
algebra
When fighting a fire the velocity V of water being pumped into the air is modeled by the function v=√2hg, where h represents the maximum height of the water and g represents the acceleration due to gravity (32 ft/s^2) The Jackson Fire dept must purchase
asked by John Smith 
Perform the indicated operations
X I I I x I V 10 1 1 1 x 15= 4 right above i have what each numerical # represents but i don't no if that's correct so far. How do i solve this?
asked by Rina 
CHAMISTRY
how many moles of potassium chloride in a 2.40L solution with a milarity of 1.35
asked by Anonymous 
Maths
Frosni receieved her credit card statement, which showed she owed $5850. Interest is charged at 19.5%pa on overdue balances. She paid 15% of this amount by the due date, How much interest is charged if she pays the remainder 20 days after the due date?
asked by JAANIE 
math
w > 2 d + 6 < 15 s  1 > 4 please explain
asked by casey 
Algebra Help please
12(74y  (6+5Y  8Z) = Please show work
asked by Todd 
5th grade math
please show how to get the answer... w>2 d+64
asked by casey 
English
Can you check the following sentences, on reflexive verbs, please? Thank you. 1) I used to live on my own (better than by myself) in a oneroom apartment. One morning, I woke up at 6 a.m. then I got up and went into the bathroom. 2) I got washed and
asked by Mike 
math
can anyone help mesolve this; ln(x+9)ln x =1 thanks in advance guys!
asked by anonymous 
space
what is a small body made of rock and ice in the solar system?
asked by keita 
Precalc
What name is given to figures (wave) to indicate that points are attracted to only certain regions in the plane and no to others?
asked by Carl 
Precalculus
The figure shows a 10 x 10 square centered at the origin. The darker shaded square is the image of this square, dilated by a factor of 0.8 and rotated about the origin by exactly the number of degrees, theta, so that its corners touch the sides of the
asked by Sam 
Spainish
I need help with estar .Is the pronoun come first,then estar,and finally the adjective.I am not to sure ):
asked by Deep in destress 
us history
I'm writing a paper about reenlisting during the American Revolution, even though I'm miserable with the sick and dying all around me. I need to come up with a good grabber to start my paper with. Can you help?
asked by KC 
algebra
Perform the indicated operation 1/3divided by 3/8
asked by josh 
chemistry/stiochiometry
can someone explain to me how to find the concentration of a liquid
asked by "anonymous" 
math
3x+5y6=0 solve for y
asked by alyssa 
math
Hannah biked the following number of miles in four days. How many miles would she need to bike on the fifth day to have a mean of 5.2 miles per day? 6, 3, 4, 3
asked by anna 
math
marty ate one fourth of hiis pizza and luis ate one third of his pizza. marty ate more more pizza than luis. how is that possible?
asked by Anonymous 
Math (Statistics)
You and three of your friends are part of a group of 10 potential jurors. What is the probability that you and your 3 friends are the last 4 people chosen?
asked by Heather 
chemistry/stiochiometry
for instance Will write a problem. Now, I don't just want the answer, I want to know how to know which substances, and processes in steps and don't spare detail. I am going through high school chemistry. somehow i PAST MY Stoichiometry test. now i am ready
asked by "anonymous" 
social studies
1. define Allah 2. the word Muslim means...? 3.JIHAD means to strive... what are Muslims striving for? 4. list and describe 5 contributions of Muslims to our lives today
asked by Bri 
math
Please check my answers: How are the symbols 3/4, 0.75, and 75% related? They are all different ways to express the same number. 2.(4pts) Use inductive reasoning to predict the next number in the sequence. 1, 2, 2, 4, 4, 8, . . .8 because each number after
asked by Anonymous 
science
Dose the medium travle along with the wave?PLEASE HELP!!!!
asked by haliey peterson 
Math
200 divided by 2x^2
asked by Natalie 
Ethics
What does Peter Vardy say about human experimentation?
asked by Anique 
algebra 2
Solve the following equation for the variable x. (4/x2)+(3/x+2)=(3x/x^24) Thank you very much for your help.
asked by Esther 
physics
need to know mass and acceleration of a 30.5 bloch connected to an empty 1.00kg bucket by cord running over a frictionless pulley coefficient of static friction between table and block is 0.405 and coeff. of kinetic frict. between the table and the block
asked by sara 
Algebra 2
Solve the following for the variable x. (7/x2)+(1/x+2)=(3x/x^24) Thank you.
asked by Esther 
math
insert the symbols /,*,,and+ in these numbers i.e. 44444 in such a way that the answer is 5.
asked by Anonymous 
5th grade math
please show how to get the answer... w>2 d+64
asked by casey 
math
if there is 22 teachers for every 500 students, how many teachers are there for 1210 students?
asked by Anonymous 
Math
How do you calculate how many images there will be in a certain number of iterations?
asked by John 
Math
what is 9*8=
asked by Jaismin 
choir
how do you sing properly using your resonators
asked by Anonymous 
algebra
solve for solution 6m+n=17m5n=8
asked by vee 
Interpersonal Communications
What is the social exchange theory?
asked by Megan H. 
math
joe had four times as many dimes as pennies in her pocket. she spent two dimes and got two pennies in change. Now she has three times as many dimes as pennies. jo started with how many dimes?
asked by pavlina 
Math
How do you answer this problem? The square root of 24 subract the square root of 3/2.
asked by Charlotte 
chemistry
3 molecule of water contains how many grams?
asked by aryan 
math
Sara walks 2.75 Miles in 0.8 hours, how many miles she can walk in one hour?
asked by Anonymous 
math
Translate the following situation into an inequality. Do not solve. “Charlie would like to pack one less outfit than Jane for their trip. Loretta would like to bring five outfits less than twice what Jane packs. Due to space in the suitcase, they are
asked by Anonymous 
math
what is the difference of 8 and the quotion of 5
asked by megan 
math
You have an empty shelf in your store which measures 2 feet by 3 feet, and need to stock it with one layer of merchandise. How many 12 inch by 12 inch boxes do you have room for? 2 4 5 6
asked by malik 
math
15% of x = 45
asked by Sally 
english
projects for the stranger by albert camus
asked by Anonymous 
science
If 1L (Liter) of 0.1N (Normal) NaOH is needed to titrate a wine sample, how many moles of H+ was neutralized?
asked by joey 
forest hill
what follows a likning or action verb?
asked by courtney 
math
what is the degree and order of (1+y')^2=(y')^2
asked by vera 
Interpersonal Communications
Whatt is dialectical theory and how does it apply to relational development? I am having a hard time understanding what my textbook says on it. Could you please help me understand it in simplier terms? Thank you very much! :)
asked by Meg Hat 
Science
If we can't dig to the center of the earth, how do we know that is down there?
asked by Anonymous 
social studies
what is capitalism
asked by Anonymous 
Psychology
Which one of the following statements about intelligence is the most accurate? IQ is a valid measurement, and environmental factors do not change mental ability. Intelligence is mostly genetic, has the most variability between groups, and is reliable
asked by Chloe 
length
19=what yards? what foot?, or what yards?
asked by lidia 
English
is it right if i say "spirit of belligerence"?
asked by zealous 
math
There are about 3400 species that represent 90 percent in the world what is the total number.
asked by jack 
GVCS
how do u find the standard numeral for 9.3x10^4
asked by lexie 
anonymous
lactic acid added with potassium bicarbonate and sodium bicarbonate
asked by Anonymous 
algebra 2
7/x+5/x3
asked by gabriel 
maths
shane wants to paint the outside of his house, the area to be painted is 217m2. five litres of paint will cover an area of 62m2. how many litres of paint will shane need to paint the outside of his house!
asked by chloe 
math
convert 5040 cubic inches to cubic feet
asked by stanly 
math
2x=x+3
asked by kayla