Questions Asked on
May 13, 2013

Math~Polynomials
1)6g+8k9g+2k(1point) 3g+10k 3g+10k*** 17gk 10k3 2)4x+6x^2+5x(1point) 7x^3*** 6x^2+9x 6x^29x 6x^2+x 3)a^2+5a3a^2(1point) 5a+2a^2 2a^2+5a*** 3a^2+6a 5a3a^2 4)3x^2+8x+7x(1point) 3x^2+15x*** 18x^3 3x^2+1 3x^2x 5)Find the degree of
asked by Gabby 
Bio
In order to maintain homeostasis, human cells must have a higher concentration of sodium ions outside the cell than inside the cell. In addition, the concentration of potassium ions must be higher inside the cell than outside the cell. Which of the
asked by Wyatt 
Physical Science
Blood is pumped from the heart at a rate of 5L/min into the aorta of radius 2.0cm. Assuming that the density of blood 1x103 kg/m3 .Determine the velocity of blood through the aorta
asked by Janaiby 
geometry
To estimate the height of a flagpole, Marci, who is 5 feet tall stands so that her lines of sight to the top and bottom of the pole form a angle. What is the height of the pole to the nearest foot?
asked by Stan 
Chemistry
How much water, in grams, can be made from 6.82 × 1024 hydrogen molecules? Answer in units of g
asked by Anonymous 
Calculus
The acceleration due to gravity near the surface of Mars is 3.72ms^2 . A rock is thrown straight up from the surface with an initial velocity of 23ms^2 . How high does it go?
asked by Grant 
HARD CHEM QUESTION any help appreciated
Phosgene (COCl2) is a poisonous gas that dissociates at high temperature into two other poisonous gases, carbon monoxide and chlorine with equilibrium constant Kp = 0.0041 at 600 K. Find the equilibrium composition of the system after 0.124 atm of COCl2 is
asked by scilover 
college algebra I
68 is the product of Vanessa's age and 4. use the variable v to represent Vanessa's age. How do I write this expression
asked by topaz 
chem
a grocery store sells vinegar in 1Lbottles. based on your results, how many grams of acetic acid are in a bottle?
asked by b 
Chemistry
Find the enthalpy for : 4Fe + 3O2 = 2Fe2O3 I got the following informations: Fe + 3H2O = Fe(OH)3 + 3/2H2  Enthalpy is 160.9 kj H2 + 1/2O2 = H2O  Enthalpy is 285.8 kj Fe2O3 + 3H2O = 2Fe(OH)3  Enthalpy is 288.6 I try using Hess Law but cannot solve it.
asked by Shadow 
pre calculus
Cot 495 degrees... a) tan 135 degrees b) cot 135 degrees c) cot 135 degrees d) cot 315 degrees
asked by Anonymous 
Math
We have an important chemsitry test due and I want to make sure that I do not mess up on my algebra. I am dealing with the integrated rate law, but my question is purely algebraically in nature. I hope, somebody can help me. 1) ln(A) = kt+ln(B) solve for
asked by Yasemine 
Chemistry
How many grams of gas are present in a sample that has a molar mass of 70 g/mol and occupies a 2 L container at 117 kPa and 35.1C?
asked by Dori 
Algebra 2
Solve for x under the assumption that x > 0. Enter your answer in interval notation using grouping symbols. x  (10/x) < 9 I need someone to show me how to work through this type of problem, I don't understand it.
asked by Tristan 
PreCalculus
Sin5x cos2x + cos5x sin2x=
asked by Becky 
history
What does this quote mean? "It is honorable to be raised to a throne than to be born to one. Fortune bestows (gives) the one, merit obtains to other." Francesco Petrarch
asked by kate 
geometry
A bicycle wheel is 56cm in diameter . How many complete turns does it make in travelling 1km ? Use the value ^ for( 22/7)
asked by Ruth hirst 
Math
Why did Airhead eat the dollar he brought to school
asked by Emmanuel 
college Chemisrty
at what kelvin temperature will 25.2 of xe occupy a volume of 645 L at pressure of 732 torr?
asked by judy 
Physical Education
Suppose that blood flows through the aorta with a speed of 0.35 m/s. The crosssectional area of the aorta is 2.0x104 m2. (a) Find the volume flow rate of the blood (b) The aorta branches into tens of thousands of capillaries whose total crosssectional
asked by Janaiby 
Trigonometry
Find all solutions between 0 and 2pi. Round to two decimal places. In radians. Find all solutions between 0 and 2 pi. Round to two decimal places for the final solutions. The answers should be in radian mode. If you can use exact values use them. At least
asked by Taylor B 
Math
A letter carrier can deliver mail to 112 homes per hour by walking and 168 homes per hour by driving. By what percent is productivity increased by driving? Answer: 56% Is my answer correct?
asked by Ann 
chemistry
what volume of carbon dioxide is formed when 11 of CS2 reacts with 18 L O2 to produce carbon dioxide gas and sulfur dioxide gas at STP?
asked by danna 
chemistry  thank you:)
What volume of H2SO4 0.04 M is required to completely neutralize 200 mL of Al(OH)3 0.02M?
asked by lea 
chemistry
The reaction of chlorine gas with solid phosphorus (P4) produces solid phosphorus pentachloride. When 63.5 g chlorine reacts with 28.5 g P4, which reactant is limiting?
asked by Robin 
Chemistry
What is the concentration of NO− 3 after mixing? Answer in units of mol/L
asked by Anonymous 
Math
By what percent is a 100watt light bulb brighter than a 60watt light bulb? Round to the nearest tenth. 40/60 = 2/3 = 2 ÷ 3 = 0.666667 0.666667 x 100 = 66.6667% Answer: 66.7% Is this correct?
asked by Ann 
physic
an enemy spaceship is moving toward your starfighter with a speed of 0.4c, as measured in your reference frame. The enemy ship fires a missile toward you at a speed of 0.7c relative to the enemy ship. If you measure the enemy ship to be 8.0 x 10^6 km away
asked by yanis 
Public speaking
When conducting research for supporting materials, it is imperative to remember: A. there is one right source for certain information. B. always to take notes and record. C. always do a personal interview. D. use only the most current source of information
asked by james 
Algebra (factorial)
Evaluate gcd(19!+19,20!+19). Details and assumptions The number n!, read as n factorial, is equal to the product of all positive integers less than or equal to n. For example, 7!=7×6×5×4×3×2×1.
asked by Mathslover 
linear algebra
solve using gauss jordan 10y − 4z + w = 1 x + 4y − z + w = 2 3x + 2y + z + 2w = 5 −2x − 8y + 2z − 2w = −4 x − 6y + 3z = 1
asked by DON 
macroeconomic
Bill can paint either two walls or one window frame in one hour. In the same time, Frank can paint either three walls or two window frames. To minimize the time spent painting, who should specialize in painting walls, and who should specialize in painting
asked by winnie 
Math
Explain It How is adding and subtracting with money like adding and subtracting whole numbers?
asked by Quan 
Math
An airplane is flying at an altitude of 6 miles and passes directly over a radar antenna. When the plane is 10 miles away, the radar detects that the distance is changing at a rate of 240 mph. what is the speed of the plane? This is an implicit
asked by Chloe 
Calculus
At time t = 0, a seed is planted. After t weeks, the height of the plant is given by f(t) = 0.3t² = 0.6t = 0.5 inches. At what rate is the plant growing after
asked by Joy 
Mathematics
Ellen is 11 years older than Maja. Last year Ellen was twice as old as Maja. How old is Maja now?
asked by Anonymous 
Math
What are three ways to write 5^11 as a product of two powers
asked by Batman 
Math  Probability
in a primary school 70% of the boys and 55% of the girls can ride a bicycle. if a boy or a girl are chosen at random, what is the probability that both of them can ride a bicycle?
asked by donald 
vocab
__________ definitions are made up of the set of associations implied by a word in addition to its literal meaning. A. Connotative B. Direct C. denotative D. None of the Above.
asked by cbaby 
Physics
 The Mariana trench is located in the Pacific Ocean at a depth of about 11000 m below the surface of the water. The density of seawater is 1025 kg/m3. (a) If an underwater vehicle were to explore such a depth, what forces would the water exert on the
asked by Janaiby 
MATHS STATISTICS
B. A softdrink vending machine is supposed to pour 8 ounces of the drink into a paper cup. However, the actual amount poured into a cup varies. The amount poured into a cup follows a normal distribution with a mean that can be set to any desired amount by
asked by DON 
Math
If 453 runners out of 620 completed a marathon, what percent of the runners finished the race? (Round percent to the nearest tenth.) Answer: 453/620= .731 Changing to percent 73.1% Is this correct?
asked by Ann 
Physical Science
A dentist’s chair with a patient in it weight 2100N. The output plunger of a hydraulic system begins to lift the chair, when the dentist’s foot applies of 55N to the input piston. Neglect any height difference between the plunder and the piston. What
asked by Janaiby 
chemistry
balance the equation and name the reaction taking place C3H5OH+O2 equals CO2+ H2O
asked by patricia purnell 
Math
Find the amount in each case. 8% is 56 kg.
asked by Lana 
geography
Under Communist leadership, North Korea has continued to evolve
asked by Liberty 
Chemistry
An unknown amount of water is mixed with 350 mL of a 6 M solution of NaOH solution. A 75 mL sample of the resulting solution is titrated to neutrality with 51.2 mL of 6 M HCl. Calculate the concentration of the diluted NaOH solution. Answer in units of M
asked by Anonymous 
Biology
What causes mutations in bacteria? and Can mutations affect plasmids?
asked by Rebekah 
trig
if 5cos A plus 3=0 and 180
asked by patience morakile 
Math
A movie theater charges $6 for each adult and $3 for each child. If the total amount in ticket revenue one evening was $1428 and if there were 56 more children than adults, then how many children attended?
asked by Karin 
Chemistry
The following data was obtained from titrating a solution containing 25 mL of 0.0100 M MgCl2 solution, 1 mL of NH3OH buffer, and 10 drops of Calmagite with EDTA. Calculate the concentration of EDTA. Report the answer with three sig figs. Please help it
asked by shannon 
5th grade math (dividing fractions)
Can you check this problem? How many twelfths are in one sixth? work: 1/6 divided by 1/12 = 1/6 * 12/1 = 2 ans= 2
asked by Alex 
CalculusPLZ help!
Given u=3i2j+k,v=2i4j3k, w=i+2j+2k, 1 Find a unit vector normal to the plane containing v and w. 2 Find the volume of the parallelepiped formed by u, v, and w. 3 Are any of these vectors parallel? Orthogonal? Why or why not?
asked by Liz 
Thermodynamics
In a multipledevice flow system, I want to determine a state property. Where should I look for information, upstream or downstream?
asked by Kyle 
physics
Three identical conducting spheres are located at the vertices of an equilateral triangle ABC. Initially the charge the charge of the sphere at point A is qA=0and the spheres at B and C carry the same charge qB=qC=q. It is known that the sphere B exerts an
asked by stranger 
Chemistry
.012 mol of solid NaOH is added to a 1 L solution of HCl 0.01 M. What is the pH of the solution?
asked by scilover 
chemistry
Physicain elects to rehydrate the patient br intravenous(IV) administration of 2.0 L of 0.45% (w/v) of NaCl. 0.45%9w/v) = 0.45g/100ml A.How many grams of NaCl were given? B.How many moles of Nacl were given? C.What is the molarity of the NaCl solution?
asked by Monica 
Maths
If sin 23=p,write the following in terms of p cos 113,cos 23,tan 23
asked by Dineo 
Physical Education
(a) Calculate the average blood velocity in the major arties given that the aorta has a radius of 1.0 cm, the blood velocity is 30 cm/s in the aorta, and the total crosssectional area of the major arties is 20 cm2 (b) What is the total flow rate? (c) On
asked by Janaiby 
chemistry
3.Suppose the innermost orbit an electron can occupy has an energy level of 19 eV. Based on the absorption spectrum shown below, what is the energy of energy level 4?
asked by Anonymous 
science
I need an example of an acrostic poem for the word kinetic please help!!!!!!
asked by devon 
programming
Write a program reads the city names and respective gas prices into 2 singlesubscripted arrays in your program  one of type string, the other of type double. (We would call these "parallel arrays"  each corresponding location shows the city name and gas
asked by George 
French
i need to write a french conversation about going to places such as the cinema, library and do activities. i started off but i need help so far: ABonoujour Becca B Salut Alex comment ca va? A Ca va bien, et toi Bca va tres bien AQu'estce que tu vas
asked by Sam 
German grammar
Decide if the following sentence is grammatically CORRECT or INCORRECT. Die Wellen haben sehr gross geworden. correct incorrect i feel like this is correct. i also feel like it could be written differently but i don't know if both ways are correct, or only
asked by bubbie 
Maths  Probability q2
Five cards are lettered A, B, C, D, E Three cards are chosen at random one after the other without replacement and are in the order shown below First, Second, Third What is the probability that the cards spell the word BED
asked by donald 
Math
Bess is making pillows to decorate her bed. she is going to make three square pillows that are each 2 feet by 2 feet. she wants to use the same trim around each pillow.how many feet of trim will she need for all three pillow?
asked by Klein 
Chemistry
How many moles of sulfuric acid are required to neutralize 0.80 mol of sodium hydroxide? H2SO4 + 2NaOH > Na2SO4 + 2H2O I got 0.40 mol. Is this right?
asked by Anonymous 
math
your school librarian has asked your class for some help on the purchase of some new bookcases with two shelves each. She has 300 new books she needs to shelve. One half of the books are half an inch thick. Ones third of them are one fourth of an inch
asked by Anonymous 
Physics
Jack and Jill are skating. Jill has a mass of 50 kg, Jack has a mass of 80 kg. At t=0 seconds Jill starts skating across a 50 m diameter rink at a speed of 3 m/s. After 3 seconds Jack skates after her with a speed of 5 m/s. When they meet, Jack scoops up
asked by Hale 
math
Rohnda is in charge of buying food for the school picnic, she found that hot dogs are in packages of 24, buns in packages of 18, ketchup in boxes of 12, and mustard in boxes of 15. what is the least number of students that can be feed if each student
asked by marissa 
Language Arts
Need help on the question below. On our hike, the rain (fell steady or fell steadily) for more than an hour. Thanks...
asked by Brandi 
Math
After a 15% pay raise, Scott Walker now earns $27,600. What was his salary before the raise? Answer: 27600=.15x*27600 x=4140 276004140=23,460 Is my answer correct?
asked by Ann 
algebra
You are using 0.05 gallons per mile of a SUV gas tank that holds 16 gallons. Note: this equation has a negative slope (m). Use xvalues: 0, 160, and 320. I think the problem should be y=.05x+16 Confused since the teacher says it has a negative slope.
asked by caitlin 
math
Triangle LNK is isosceles and line LK is the base. use a paragraph proof to prove that triangle LNK is equal to triangle KNM
asked by emilee 
math
in a primary school 70% of the boys and 55% of the girls can ride a bicycle. if a boy or a girl are chosen at random, what is the probability that both of them can ride a bicycle?
asked by donald 
Mathematics
Sean is 20 and his brother is 12. How many years ago was Sean three times as old as his brother?
asked by Anonymous 
Math
Elijah draws shapes on his graph paper.He draws a square with sides 1/2 inch long. He draws an equilateral triangle with sides that are 1/4 inch long. What is another measurement that describes the length of the triangle's sides ? a. 2/1 inch b. 2/2 inch
asked by Debora 
Fnance
If a firm has a debtequity ratio of 1.6, then its total debt ratio must be?
asked by Lisa 
biology
The nonliving matrix of the connective tissue through which the blood cells freely flow is the? A. plasma B. extracellular fluid. C. intracellular fluid. D. submucosa
asked by Linda 
Math
Sunshine Honda sold 112 cars this month. If that is 40% greater than last month, how many cars were sold last month? x=112*100/140 x= 80 Answer: 80 Is this correct?
asked by Ann 
MATHS STATISTICS
A. According to an estimate, 50% of the people in the United States have atleast one credit card. If a random sample of 30 persons is selected, what is the probability that 19 of them has atleast one credit card? PLIZ REALLY NEED HELP!! THANKS VERY MUCH..
asked by DON 
MATHS
Logan Academy students take part in four field trips during the school year. They visit a library, a museum, a park, and a zoo. How many different ways can the four trips be ordered for the school year?
asked by BRYAN 
physics
Adam can run a lap on a certain circular track in 50 seconds. Grampy Sampy can run a lap on this track in 90 seconds. They start at the same location at the same time and move in the same direction. If they each run at a constant speed, how many seconds
asked by kathy wong 
Physical Education
A solid object floats on ethyl alcohol, with 68.2%of the object’s volume submerged .Find the density of the object. Take density of alcohol =806 kg/m
asked by Janaiby 
math (statistics)
A manufacturing company produces 10,000 plastic glasses per week. This company supplies plastic glasses to another company, which packages the glasses as part of picnic sets. The second company randomly samples 10 glasses from the supplier. If at least
asked by michin 
Calculus
The marginal cost for a product is given by dC/dq = 1000/sqrt3q+20, in hundreds of dollars, where q is given in thousands of units. Determine the cost in dollars involved in increasing product from 10 to 15 thousand units. If R(0)= C(0)= 0, the marginal
asked by Grant 
Math
Graph and identify the coordinates of a rectangle with a length of at least 5 units and a width of at least 2 units. Each vertex of the rectangle must be in a different quadrant. Two of the points must have rational coordinates that are not integers.
asked by Bell 
precalculus
solve equation for solutionn over interval [0,360): cot(è)+4csc(è)=5
asked by mike 
Math(combinations) Help
Let Pn be the set of all subsets of the set [n]={1,2,…,n}. If two elements of P5 are chosen at random, the expected number of elements (of [n]) that they have in common can be expressed as a/b where a and b are coprime positive integers. What is the
asked by Mathslover 
math
Find the maximum and minimum of f(x; y) = 7x  10y subject to the constraint x2 + 4y2 = 136. can someone tell me the final answer because my final answer has a lot of decimal point. Is it relevant?
asked by ifi 
math
I am a number with 2 more tens than one. I have 5 mores ones than hundreds. the sum of my digits is 18. What number I am?
asked by kevin 
Chemistry
In the titration of 14.0 mL of 0.10M acetic acid with 0.40 M NaOH, (A) How many mL of NaOH needed to completely neutralize the acid? Given the balanced equation: CH3COOH (aq) + NaOH (aq) CH3COO Na (aq) + H2O
asked by Lisa 
Find the center (h,k) and radius
Find the center (h,k) and radius r of the circle and then use these to (a) graph the circle and (b) find the intercepts, if any. 3x^2+36x+3y^2=0
asked by Liz 
Chemistry
Three solutions 56.0 mL of 0.6 M KNO3; 77.0 mL of 0.6 M Ca(NO3)2; and 42.0 mL of 0.29 M KCl were poured together to make one new solution. What is the concentration of Cl− after mixing? Answer in units of mol/L
asked by Anonymous 
chemistry
a sample of 15.00 g of an unkown metal chloride, MCl2 is dissolved in 75.0 mL water. the boiling point of the resulting solution is measured at 102.37 degrees C. what is the identity of the metal M.
asked by alice 
math
A car factory can produce 362 cars every 8 h. How many cars could the factory produce in 44 h?
asked by Anonymous 
physics
A resistor of resistance R is connected to a power supply of constant EMF E=12 V and internal resistance r=3 Ω . The energy dissipated in the resistor R is used to heat water. What resistance R in Ohms gives the maximum power dissipated in the resistor?
asked by intermediate player PLEASE HELP 
precalculus
solve equation for solutionn over interval [0,360): cot(è)+4csc(è)=5
asked by mike 
physics
Two point charges +q=1 μC and −q=−1 μC with mass m=1 g are fixed at the positions ±r⃗ 0 with r0=1 m. The charges are released from rest at t=0. Find the time τ in seconds at which they collide.Hint: Can you do it without integrating by using
asked by stranger 
Finance
Dan buys a new desk for $3,000. Miller will pay back $260 per month. Interest is 5% on the unpaid balance. Calculate balance outstanding after second payment (Use U.S. Rule)
asked by Davoni 
college algebra i
x is less than or equal to 1 and greater than 5. how do i write this
asked by topaz 
investing
A 5% coupon bond with 9 years to maturity has a yieldtomaturity of 7%. Assuming the coupons are paid semiannually and the principal amount is equal to 100, what is the price of the bond?
asked by Anonymous 
math30
If loga(x + b) = c, then x is equal to where a is the base. a. x = a^c – b *this is the answer* why??
asked by alejandro 
Math
I have to find the apothem of a triangle. It's a 606060 triangle with sides of 6. Help!
asked by Tia 
algebra!!! please help...
Let f(x) be a polynomial such that f(f(x))−x^2=xf(x). Find f(−100).
asked by glo 
CrossMultiply
9. Explain the process of crossmultiplication.
asked by Serena 
chemistry
If something originally contained 32.0 g of Po210, which has a halflife of 10.5 minutes, and was now 73.5 minutes old, how many grams would be left?
asked by Mary 
math
The cicircumference of a wheel is 2m how many times does the wheel turn in travelling 3km
asked by terrall 
physics
Name of physics book for 11 and 12.to catch engineering exam and other competetive exam
asked by john 
Chemistry
If I used 100% larger sample mass of an unknown substance what effect would that have on the empirical formula that would be obtained?
asked by Kevin 
biology
A researcher develops a new drug that kills cells by preventing transcription. The most direct effect of the drug is to prevent cells from? A. making new DNA. B. exporting substances to the cytoplasm. C. making protein. D. breaking down substances in the
asked by Linda 
math
Koley makes $4.00 per week for washing dishes. She pays her sister Amy $0.75 each time Amy does the dishes for her. Is that fair? Please explain how I get the answer because I don't understand it/
asked by Celest 
College Algebra
For the given functions f and g, find the following and state the domain of each result. f(x)=√x;g(x)=7x2 (a)(f*g)(x)= What is the domain of f*g? (b) (f/g)(x)= What is the domain of f/g?
asked by Alex 
Math  Maximizing Logarithm
x and y are positive values satisfying x + y = 1/4. When ln(y^2+4xy+7) attains its maximum (subject to the given constraint), what is the value of 1/xy?
asked by Dan 
math
The greatest common factor of 2 numbers is 14, the least common multiple is 168. If the 2 numbers are not 14 and 168, what is the sum?
asked by marissa 
chemistry
What volume of 31.5 grams of molecular element,chlorine gas, occupy at a pressure of 1.29 atm and temperature of 20 degrees cesius, assuming that the behavior of chlorine gas is ideal?
asked by Anonymous 
Alegebra
Solution A is 60% alcohol and Solution B is 30% alcohol. How much of each is needed to make 30 gallons of a solution that is 40% alcohol
asked by Thomas 
Science
Please for the classification of metals, their uses in the home and the care of each metal. Please help me!!!!!!
asked by Divine 
Ms sue please help
Hey ms sue can you please help me to simplify this paragraph? Raynaud's disease occurs when the small arteries (arterioles) that serve the fingers, toes, ears, or nose go into spasm. When arterioles go into spasm, they cut off blood supply and cause digits
asked by Shreya 
language arts
1. The word centuries contains the Latin root cent, meaning "hundred." Which of the following words contains the same root? center accent decent percent 2. The word mark is an AngloSaxon word meaning "boundary." Which of the following words does NOT
asked by Delilah 
algebra!!!! please help me!!!!
Find the number of real solutions of the system of equations. x^2−y^2=z y^2−z^2=x z^2−x^2=y
asked by glo 
algebra 
#21 can you help me solve this equation: 3x^2 (2x  2) i keep getting: 6x ^2 6 #22 can you check this one: (2x ^2) (6x^2) i got 12x #23 can you check this one: (4m^2 + m 2) + (m^2  3m) i got: 4m ^2 + 4m2 #25 can you check this one: (3x^2 x 1) +
asked by marko 
science
5 mL O.1 M HCL...How much 0.1 M NaOH is needed to neutralize the acid? Thank you
asked by mae 
english
Hey, as you know I'm German, but I love this clappping game (Hanky Panky). Down by the banks of the Hanky Panky Where the bullfrogs jump from bank to banky Where the eeps, ops, sodapops Hey Mr. Lilypad and went kerplop Is there any meaning? I am not able
asked by Minnie 
math
anita earned $475.54 in 2 weeks have earned the same amount of money each hour that she worked if anita worked a total of 62 hours during those 2 weeks about how much did she earn each hour?
asked by ally 
biology
The scientific binomial name of a species is Canis vulpis. Which of the following is true? A. the species belongs in the family Canis. B. the species belongs in the genus vulpis. C. the species belongs in the genus Canis. D. the species belongs in the
asked by Linda 
Fundamentals of Interpersonal Communications  170
• a room that would facilitate team interaction. How would this room look? • How would the room be arranged? • What would the seating arrangement look like? • What colors or decorating schemes would be used? • How would this setting communicate
asked by MARY 
Algebra Please Help
Find the sum of integers c for all triples of integers (a,b,c),a≤b≤c, that satisfy the system of equations a^2−bc=91 b^2−ac=91 c^2−ab=91 Details and assumptions If a number c appears in several different triples (a,b,c), it must be counted with
asked by Mathslover 
Math
Your parents allow you to play video games for no more than 8 hours a week. You have already played for 2.5 hours this week. Write and solve an inequality that represents how much more time you can play video games this week. Graph the solution on a number
asked by Bell 
investing
A 6% coupon bond with 7 years to maturity has a yieldtomaturity of 3%. Assuming the coupons are paid semiannually and the principal amount is equal to 100, what is the Macaulay duration of the bond (in years)?
asked by Anonymous 
math
Simone would like to cover her patio with an outdoor carpet which costs $22.50 per square yard. If the patio measures 9 ft long and 14 ft wide, what would the total cost of the carpet be?
asked by link 
Math (Algebra)
If positive integers x and y satisfy the equation xy−5x−10y+43=0, the sum x+y is constant. What is the value of x+y?
asked by Tom 
chemistry
What is the molarity of the acetic acid if 0.5ml of a vinegar solution has been titrated with the 0.101M solution of NaOH and the volume of the NaOH solution at the equivalence point is 5.0mL?
asked by RC 
math (2nd Try)
A salesman gets paid on commission, and his commission is based on how many units he sells during the month. If the salesman sells $1500 worth of units or less, he makes a flat commission of $900 plus 10% of the sale. If he sells more than $1500 worth of
asked by Jane 
Math
By what percent is a 100watt light bulb brighter than a 60watt light bulb? I'm not sure the equation to use to solve this one.
asked by Ann 
Polynomials
Let f(x) be a polynomial such that f(f(x))−x^2 =xf(x). Find f(100)
asked by Mary 
math
Rob is 2/3 of his dad height.If his dad is 6'3" tall how tall is Rob? Give the answer in feet and inches. Please help me I do not get this.
asked by Anonymous 
Math
5. The pet shop down the street owns 84 fish. The ratio of birds to fish is 3 to 7. How many birds are in the pet shop?
asked by Alice 
physics/chemistry(kinetic ..gasses)
How many degreed of freedom have the gas molecules,if under standard conditions the gas dendity is 1.3kg/m^3 and velocity of sound propagation on it is v=330m/s?
asked by duke 
algebra.. HELP ME!!!
Let f(x) be a polynomial such that f(f(x))−x^2=xf(x). Find f(−100).
asked by flex 
Physical Science
 What is the kinetic energy ,KE, per unit volume V of blood that has a speed of 0.5 m/s. Take density ofƒâblood = 1.0x103kg/m3
asked by Sara 
math
how do i change 9 5/9 to an improper fraction
asked by John 
Algebra Please Help
What is the largest prime factor of 5^8+2^2?
asked by Mathslover 
math
How to tell 4/7 on a ruler
asked by ethan 
physics
a car weighing 14700N is moving at 20m/s. If the frictional force on it is 2160N , How fast would it be moving when it has travelled 50m
asked by maham 
Physics
An optical fiber is a flexible, transparent fiber devised to transmit light between the two ends of the fiber. Complete transmission of light is achieved through total internal reflection. This problem aims to calculate the minimum index of refraction n of
asked by Rohan 
Physics
At the upper surface of the earth's atmosphere, the timeaveraged magnitude of the Poynting vector is referred to as the solar constant and is given by =1.35×103W⋅m−2 . (a) If you assume that the sun's electromagnetic radiation is a plane sinusoidal
asked by Rohan 
algebra
Find the largest possible integer n such that there exists a nonconstant quadratic polynomial f(x) with integer coefficients satisfying f(1)∣f(2),f(2)∣f(3),…f(n−1)∣f(n). Details and assumptions: ~For (possibly negative or zero) integers m and k
asked by flex 
Science
Please for information on how to care each classification of metals.
asked by Divine 
Science
describe the changes in volume, motion, and energy that gas particles experience as heat is taken away
asked by Anonymous 
Math
What is the portion if the base is 900 and the rate is 12¾ %? P=RxB P=12.75x900 P=11,475 Is this correct?
asked by Ann 
chemistry
a sample of 15.00 g of an unkown metal chloride, MCl2 is dissolved in 75.0 mL water. the boiling point of the resulting solution is measured at 102.37 degrees C. what is the identity of the metal M.
asked by lucy 
social studies
An example of interstate cooperation required by the consitution would be
asked by Anonymous 
math
18 minutes can be expressed as ab of an hour, where a and b are positive, coprime integers. What is a+b?
asked by jamesbond 
Mathematics
Pam is 14 and her dad is 37. In how many years will Pam's dad be twice as old as she will be?
asked by Anonymous 
Algebra Please Help
Determine the last three digits of 2^5+3^5+4^5+......+10,000,000^5 + 2^7+3^7+4^7+......+10,000,000^7
asked by Mathslover 
math
Find the f''' of function f(x) = e2x6 + [lnx]2. Does we need to do by part? Can someone plz give me the final answer. I do this without using the by part formula..can it be correct?
asked by ifi 
Writing
Can you proofread my essay? The assignment was to write a problemsolution essay on a big social issue in our world. “Never doubt that a small group of thoughtful committed citizens can change the world; indeed, it's the only thing that ever has.” A
asked by Monae 
Math (Algebra) Remainder Theorem
What is the remainder when f(x)=x^2220 + x^2215 + x^2210 + … + x^10 + x^5 + x^0 is divided by x^4 + x^3 + x^2 + x + 1? Note that: x^0 = 1
asked by Tom 
Calculus
Given f(x)=1+2cos x , find the area under the curve y=f(x) between x = pi/2 and 2pi/3.
asked by Grant 
life orientation
describe the substance abuse of both legal and illegal drogs among the youth and explain the the factors that contribute to the disease.
asked by Rabelani 
Math
Three of every seven sales transactions at Dollar Discount are on credit cards. What percent of the transactions are NOT credit card sales? (Round percentages to the nearest tenth.) Answer: 57.1% Is this answer correct?
asked by Sue 
Calculus
Fuel is flowing into a storage tank which can be filled to a depth of 6 metres. When the fuel started flowing the tank was already filled to a depth of 2.5m. If the rate at which the depth of fuel in the tank is increasing, in metres per hour is given by
asked by Grant 
Math
What is the difference of temperature for the following readings 1)8.7 degree centigrade & 2)5.6 degree centigrade
asked by Nimra Atiq 
Geometry
ABC is a triangle with a right angle at A. M and N are points on BC such that AM is the altitude, and AN is the angle bisector of A. If CN/NB=21, what is CM/MB ?
asked by AA 
Math
FRUIT PRICE: PINEAPPLE $0.80 APPLE:$0.10 PEAR:$0.25 ORANGE:$0.15 Mango:$0.30 IF ELLIS HAS 3/10 OF A DOLLAR, WHICH TWO FRUITS CAN HE BUY?
asked by Debora 
Math
A person who weighs 130 pounds can burn about 300 calories per hour skateboarding. Write a function that relates the calories burned, c, to the number of hours, h, spent skateboarding. Identify the independent and dependent variable. Create a function
asked by Bell 
Algebra PleaseHelppppppppp
For how many positive integers 1≤k≤1000 is the polynomial fk(x)=x^3+x+k irreducible?
asked by Mathslover 
Geaometry (Graph)
A graph G has 200000 edges and for any 3 vertices v,w,x, at least one of the edges vw,wx,xv is not present in G. What is the least number of vertices that G can have?
asked by Mathslover 
Math
1. What is the total sales tax to be paid in 2012 on the purchase of a 2012 passenger vehicle with a selling price of $17,000 and a $2,000 tradein allowance?
asked by Mary 
math
what is the input,if the output is 17?
asked by nyya 
photo
I have to write my Artist Statement on obsessions I am am kind of lost on what to write about.
asked by Alicia 
helllllllp math
How many positive integers n are there such that 10^n≤ n^10?
asked by Anubhav 
Math (Algebraic Manipulation) Help me please
An operation produces A−1/A from a fraction A= m/n, where m ≠ n and m ≠ 0. If the initial value of A is 24/47 and the operation is repeated 2012 times, the final output is a/b, where a and b are coprime positive integers. What is a+b?
asked by Tom 
Math (Algebra) (Distance Between 2 Lines)
If real numbers a and b satisfy a^2 + b^2 = 64, what is the distance between the lines ax + by = 1 and ax + by = 417 ?
asked by Tom 
Algebra
5/2 DIVIDED BY 4/15=
asked by Anonymous 
algebra 
#27 can you check this: 5x (x4) i got: 5x +20 #28 (y^2  y 1) + (y^2 + Y + 3) i got: 2y ^2 + 2 #29 (x^2 + 1)  (2x^2 + x 1) i got: x^2  x +2
asked by marko 
math
How many positive integers less than 1020 have all their digits the same? also give the solution kindly,,,,,,,,,and thanx a lot for the last question's answer
asked by jamesbond 
functions
What is the rule for this function? Input 1 and output 1, input 2 and output 3, input 3 and output 6, input 4 and output 10
asked by Anonymous 
investing
You work for an insurance company. You have an obligation to pay $1 mln in exactly 1.5 years from today. Your goal is to provide the company with an immunized portfolio that would hedge the current obligation. The company is only interested in firstorder
asked by Anonymous 
Print
How do you print something the size of your whole paper without it getting cut off
asked by Anonymous 
math
Tammy has 60 markers. 15 of the markers are blue. What percentage of her markers are blue? To make 0.25 a percent, how many decimal places do you move the decimal point?
asked by 1234567890 
math algebra
Determine the last three digits of 2^5+3^5+4^5+......+10,000,000^5 + 2^7+3^7+4^7+......+10,000,000^7
asked by joydeep 
PreCalculus
cotx + tanx=
asked by Jess 
polynominals
(6h+1)(9h+4) don't tell me the answer just give me the formula
asked by Alex 
Chemistry
I am dealing with the integrated rate laws. Can somebody please help me with my algebra? First order ln(A)=kt+ln(B) solve for t,and k and B Second order 1/(A) = kt+1/(B) solve for k and t and B
asked by Agnes 
math
18 minutes can be expressed as a/b of an hour, where a and b are positive, coprime integers. What is a+b?
asked by jamesbond 
PreCalculus
Given that alpha=30 degrees, a=6, and b=12. What is the number of triangles possible under these conditions?
asked by Anonymous 
Calculus
If polynomial functions f(x) and g(x) satisfy d/dx {f(x)g(x)}=2x , f(0)=−3 , and g(0)=3,what is f(10)g(10) ?
asked by Tony 
math
How to tell 4/7 on a ruler
asked by ethan 
math
what is a pentagon
asked by andrew 
Math
Michael Reeves, an ice cream vendor, pays $17.50 for a fivegallon container of premium ice cream. From this quantity he sells 80 scoops at $0.90 per scoop. If he sold smaller scoops, he could sell 98 scoops from the same container; however, he could
asked by Ann 
Math
If you can write 5 pages each hour, at that rate, how many min. would it take you to write 2?
asked by Carl 
Math
what is the difference of temperature for the below readings 1)2.1 degree centigrade & 2)5.4 degree centigrade
asked by Nimra Atiq