Tuesday

June 28, 2016
Total # Posts: 3,634

**math**

You want to cancel one variable Let's cancel the x's. 8 and 3 have a LCM, which is 24 3(8x + 9y= -19)= 24x + 27y= -57 8(-3x + 7y= -24)= -24x + 56y = -192 ------------------------------------- 0 + 83y= -249 83y= -249 y= -3 Plug into the first equation to figure out what...
*March 7, 2013*

**math help re post**

two parts to this problem 1) 2x-4> 0 2) 2x-4 <8 solve each separately 1) 2x > 4 x>2 2) 2x<12 x<6 if x is greater than 2 and less than 6 write it like this: 2<x<6
*March 7, 2013*

**Derive**

Thank you SO much sir. I feel a lot better knowing that I did this right
*March 7, 2013*

**Derive**

Find the derivative of sin(2x + 3y)= 3xy + 5y-2. I have this so far 1) cos(2x+3y) * d/dx (2x+3y)= 3xy' + 3y + 5y' 2) cos (2x+3y) * [2 + 3y']= 3xy' + 3y + 5y' 3) 3y' cos (2x+3y) + 2cos(2x+3y)= 3xy' + 3y + 5y' 4) 3xy' + 5y' - (3y(cos(3x+3y...
*March 7, 2013*

**chemistry**

it is similar to percent increase/decrease formulas. initial amount= 7.26 grams final amount= 8.61 grams percent increase= |8.61-7.26|/ 7.26
*March 6, 2013*

**math**

Calculate first how many pretzels are baked in an hour to make it easier. eight trays of twelve pretzels in them each= 8 * 12= 96 pretzels/hour 96 pretzels/ hour * 8 hours/ day= 768 pretzels/ day
*March 6, 2013*

**math**

range= absolute value of highest-lowest values highest= 2.6 degrees lowest= -2.8 degrees range= |2.6- (-2.8)| range= |2.6 + 2.8| range= |5.4| range= 5.4 degrees celsius
*March 6, 2013*

**Calculus Derivative**

I'm still not quite sure how that works out, if you can explain it please? Isn't the derivative of v dv/dt and the derivative of m (since it's a constant) 0?
*March 6, 2013*

**Calculus Derivative**

Can you please explain how you derived the first half of the second line before the '-mv * (...)'? Thank you.
*March 6, 2013*

**Calculus Derivative**

I'm trying to calculate the derivative of this: P= mv/ sqrt(1-v^2/c^2)where m and c are constants, and v depends on t. I know about the chain and product rules but I'm not even sure where to start. :/ Thank you for your help.
*March 6, 2013*

**Geography**

Houston!
*March 6, 2013*

**....**

what is the southernmost city listed on the map a. Richmond b.San Jose c.Detroit d.Houston
*March 6, 2013*

**Calculus Optimization Problem**

Thank you! I solved it out, and I got x=5 and y= 10 with a product of 500. Is this correct
*March 6, 2013*

**Calculus Optimization Problem**

Find two positive numbers whose sum is 15 such that the product of the first and the square of the second is maximal. I came up with this so far: x + y = 15 xy^2 is the maximum derivative of xy^2= 2xyy' + y^2 Now how do I solve this ^ after I set it to zero? I am stuck on ...
*March 6, 2013*

**science**

independent variable affects the dependent and changes the outcome of the experiment. therefore the I.V. is what you CHANGE. D is the answer (paper plastic and glass have different insulation levels so this is what the experiment is testing)
*March 6, 2013*

**science**

mara is preparing an experiment using three cups - one made of paper, one of plastic, and one of glass- as shown below. she plans pouring 50 ml of hot water from a pitcher into each of three cups and recording the temperatures in 5- minute intervals. what is the independent ...
*March 6, 2013*

**math**

which is correct restatement of 32% a. thirty two b. thirty two tenths c. thirty two hundredths d. thirty two thousandths
*March 6, 2013*

**English**

yes at end says.. which letter sequence remains on your page?
*March 5, 2013*

**English**

pwsafmix copy the letter string above on a piece of paper. cross out the second and last letters. Replace all vowels with letter C. insert an O before the second C. cross out the first and third letters. double the second letter. help!
*March 5, 2013*

**English**

______ and______ have been to class a. He, me b. He,I c.him, m d.him, I
*March 5, 2013*

**English**

The students felt fairly prepared for whatever tests their instructors might give them, after years of intense studying, however difficult the test might be. which group of words is misplacef in the sentence above? a.however difficult they might be b. the students celt fairly ...
*March 5, 2013*

**English**

marco was careful to wash his hands because he did not want to contract a disease what is the meaning of the word contract as it is used in the sentence above? a. a binding agreement between two parties b. reduce in size c. acquired involuntarily d. make a promise
*March 5, 2013*

**math**

an athlete. an run in 6 miles in 51 minutes. at this rate approximately how far could the runner go in 1.5 hours? A. 0.2 miles B. 8.5 miles C. 10.6 miles D. 12.75 miles
*March 4, 2013*

**math**

an athlete can run 6 miles in 51 minutes. at this rate, approximately how far could the runner go in 1.5 hours
*March 4, 2013*

**math**

an athlete can run 6 miles in 51 minutes. at this rate, approximately how far could the runner go in 1.5 hours
*March 4, 2013*

**math**

an athlete can run 6 miles in 51 minutes. at this rate, approximately how far could the runner go in 1.5 hours
*March 4, 2013*

**Math**

A number line starts with 7 and ends with 9.There are 7 marks in between. The letter A is above the 5th mark. What is the value of A as a fraction
*March 4, 2013*

**chemistry**

For a certain change, value of Delta U is -2.37 kJ. During the change, the system absorbs 650 joules. How much work did the system do? Please help! I get 3.02 but is not correct!!
*March 1, 2013*

**math**

what is the probability of drawing 5 queens from a standard deck of cards?
*February 26, 2013*

**math**

1600.
*February 26, 2013*

**Finance**

Your board of directors is thinking of taking out a loan of $500,000 for the corporporation. You have to pay $5,500 per month and $50,000 after 10 years. What annual Rate of Return would you hve to achieve on investments to make this a profitable venture?
*February 26, 2013*

**FINANCE**

What will $10,000,000 be in 12 years if it earns 7% and you add $5,000 at the beginning of every month?
*February 26, 2013*

**Math**

48000 people voted in the last election in the town of Southboro. If only 55% of the registered voters voted in the last election, how many people are registered to vote? I got 87,273 Nik put $264 in a savings account that pays 3% annual interest. How much will he have in his ...
*February 25, 2013*

**Math**

48000 people voted in the last election in the town of Southboro. If only 55% of the registered voters voted in the last election, how many people are registered to vote? I got 87,273 Nik put $264 in a savings account that pays 3% annual interest. How much will he have in his ...
*February 25, 2013*

**Math**

Is 3000 correct for the last one ? 136.40*22 48000 people voted in the last election in the town of Southboro. If only 55% of the registered voters voted in the last election, how many people are registered to vote? I got 87,273 Nik put $264 in a savings account that pays 3% ...
*February 25, 2013*

**Math**

I have the answers but i need to know the steps. Michelle has $60. If her friend Kristin has $300, what percent of kristins money does michelle have? I got 80% To Pass a test Kristin had to get 75% of the answers correct. If there were 84 questions on the test, how many ...
*February 25, 2013*

**physics**

A sled rider with a combined mass of 50.0kg are at the top of a hill of a 14m above the level of ground below. The sled is given a push providing an initial kinetic energy of 1700J. What is the potential energy at the top of the hill? After the push, what is the total enetgy ...
*February 25, 2013*

**algebra**

I need the answer
*February 22, 2013*

**algebra**

Five (5) years ago, you bought a house for $171,000, with a down payment of $30,000, which meant you took out a loan for $141,000. Your interest rate was 5.75% fixed. You would like to pay more on your loan. You check your bank statement and find the following information: ...
*February 22, 2013*

**math**

Five (5) years ago, you bought a house for $171,000, with a down payment of $30,000, which meant you took out a loan for $141,000. Your interest rate was 5.75% fixed. You would like to pay more on your loan. You check your bank statement and find the following information: ...
*February 22, 2013*

**Epidemiology**

Age (Years) Influenza / Pneumonia Deaths (Di) 2007-2011 Population (Pi) from 2007-2011 (2009 used as mid-year) <1 year 7 53,267 1-4 years 4 207,832 5-14 years 5 468,548 15-24 years 14 447,580 25-34 years 27 440,646 35-44 years 40 325,022 45-54 years 92 305,929 55-64 years ...
*February 20, 2013*

**Chemistry**

I need help with this lab. Write the equation for the decomposition of the hydrate, CuSO4*XH2O. Mass of crucible and hydrate: 93.000g Mass of crucible and pure salt: 91.196g I need to calculate the following: 1. mass of water in hydrate sample(g) 2. number of moles of water in...
*February 18, 2013*

**Cognitive psychology**

What was the varible for Mozart experiment?
*February 18, 2013*

**computer**

What combinations of memory modules will satisfy your memory upgrade to 8GB? Which of these combinations is the least expensive.
*February 17, 2013*

**social gerontology**

what is the meaning associated with dementia
*February 15, 2013*

**English**

Thank You
*February 14, 2013*

**English**

Anyone know any quotes with adverbs in them?
*February 14, 2013*

**math**

what is 5% of $11,000.00 quarterly
*February 14, 2013*

**History**

Anyone Know? Background Information: before Brown v. Board of Education Discussion on Brown v. Board case beginnings. Thesis on Brown v. Board of Education Main Argument on Brown v. Board of Education Short term and Long term Impact on Brown v. Board of Education
*February 13, 2013*

**Easy algebra**

Mike is testing new batteries to determine if the batteries last as long as advertised. The actual life of one of the batteries was only 4 weeks, 2 days, and 13 hours even though the advertisement claimed it would last 3,000 hours. What was the difference, in HOURS, between ...
*February 3, 2013*

**A quick algebra question**

Larry is having dinner at a restaurant that offers 6 different main courses, 7 different side dishes, 4 different drinks, and 4 different desserts. For dinner, Larry will choose a main course, a side dish, a drink, and a dessert. From how many different combinations can Larry ...
*February 3, 2013*

**Statistics **

Accidents on a bike path. Examining the location of accidents on a level, 5-mile bike path shows that they occur uniformly along the length of the path. Figure 3.4 displays the density curve that describes the distribution of accidents. (a) Explain why this curve satisﬁ...
*February 2, 2013*

**algebra**

For given the following piecewise function find the domain and range F(x) ={ 2x + 4 for x< -3} {-1 for -3-¡Ü x ¡Ü4} {- x 1 for x > 4}
*January 31, 2013*

**Ohio Christian University**

Find the area of the rectangular piece of glass in the Norman window pictured
*January 30, 2013*

**Grammer**

Thank You it's a lovely poem but I did not know which line was a metaphor and which line was a simile, I'm not too good at this stuff. But Thank You
*January 29, 2013*

**Grammer**

What would be 2 similes and 2 metaphors for butterfly?
*January 29, 2013*

**math**

How long will it take a car 3m long moving at 100km/h to overtake a truck 10m long moving at 50km/h if the car is 10m behind the truck?
*January 29, 2013*

**math permutations**

how many distinguishable permutations are there of the letters in the word effective
*January 28, 2013*

**physics**

Find the coefficient of static and kinetic friction of a block on a table surface. The mass of the weight is 200g and with the friction block overall the mass is 0.3 kg. With a spring scale we found Fs to be 1N and Fk to be 0.8N. Draw free body diagram.
*January 28, 2013*

**chemistry**

h2s
*January 28, 2013*

**intermediate math **

the length of a rectangular plot of land is 4 times the width. of the perimeter is 600 feet, find the dimensions of the plot
*January 28, 2013*

**Economics**

a firm in a purely competitive industry is currently producing a 1000 unir per day at a total cost of $450. if the firm produced 800 units per day, it total cost will be $300, and it it produced 500 units per day, it total cost will be $275. Requirements: (1) what are the firm...
*January 27, 2013*

**business law**

Fred and Wilma are neighbors. Every morning Fred walks his dog spike by Wilma's house, and almost every morning Spike poops in Wilma's yard. A city ordinance requires that dog oners must keep their dogs on a leash, but Fred never uses a leash while walking Spike. The ...
*January 26, 2013*

**Math**

Adam drew two same size rectangles and divided them into the same number of eqal parts. He shaded 1/3 of one rectangle and 1/4 of the other rectangle. What is the least number of parts into which both rectangles could be divided?
*January 24, 2013*

**Introduction to management**

Young, innovative, or high-tech firms often adopt the strategy of ignoring history or attempting to do something radically new. In what ways might this strategy hinder them?
*January 24, 2013*

**Math**

What would be the geometric shape of a mansard roof?
*January 24, 2013*

**math**

the lateral area of cylinder is 96ð. if h=12, find r
*January 24, 2013*

**Biology**

What piece of evidence would actually allow us to measure the actual rate at which continental drift is occurring?
*January 23, 2013*

**biology**

what is theoffspring of a yellow seed and a green seeds genotype and phenotype?
*January 23, 2013*

**Chemistry**

How do you draw Al2 + O2
*January 22, 2013*

**Medical coding 2**

The ICD-9-CM codes would be 162.9 and 511.81. According to ICD-9 codes you would code the neoplasm first. You will find 162.9 under neoplasm of bronchus and lung. The first CPT code would be 32421, thoracentisis , puncture of pleural cavity. I am still trying to find the CPT ...
*January 22, 2013*

**Chemistry**

Calculate the area in square meters of a circular skating rink that has a radius 11.2m. The relationship btwn the (A) and the radius (R) is A=
*January 22, 2013*

**Physics**

A 2kg object is attached to a spring and undergoes simple harmonic motion. At t=0 the object starts from rest, 10 cm from the equilibrium position. If the force constant of the spring k is equal to 75 N/m, calculate a. the max speed b. the max acceleration of the object. Fine ...
*January 21, 2013*

**algebra/trigonometry**

x+5 over 7 divided by 4x+20 over 9
*January 21, 2013*

**Microeconomics**

ADVANCED ANALYSIS Assume the following values for Figures 5.4a and Figures 5.4b. Q1 = 20 bags. Q2 = 15 bags. Q3 = 27 bags. The market equilibrium price is $45 per bag. The price at a is $85 per bag. The price at c is $5 per bag. The price at f is $59 per bag. The price at g is...
*January 19, 2013*

**Calculus**

Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. The diagonal of the square before...
*January 19, 2013*

**Microeconomics**

Discuss the ethics of using unconscious nudges to alter people's behavior. Within your answer, consider the argument made by economists Richard Thaler and Cass Sunstein, who favor the use of nudges. Could nudges be avoided? Do all policies contain some unconscious nudges ...
*January 18, 2013*

**math**

a time capsule is in the shape of a cylinder with a hemisphere at each end. if the capsule is surrounded with a metal outer layer 4 cm thick as shown( there's a picture) then determine the volume of the metal outer layer. round your answer to the nearest cubic centimeter. ...
*January 15, 2013*

**Chemistry**

Can someone please tell me the heat of fusion for Lauric Acid, Oxalic Acid, and Cetyl Alcohol? I've looked and can't find them anywhere! Thanks!
*January 13, 2013*

**Math**

3x/5 - x/2
*January 10, 2013*

**Math**

Lyn is 7 years old. Rose is 2 years less than twice as old as Lyn. What is the sum of their age?
*January 7, 2013*

**math**

thank you :D it helped me understand
*January 4, 2013*

**math**

you put 390 instead of 290 for the perimeter why? it has me a bit confused.
*January 4, 2013*

**math**

i didn't see it before thank you for answering my question it helped :D
*January 4, 2013*

**math**

A rectangular field is 35 m longer than it is wide. The length of the fence around the perimeter of the field is 290 m. What are the dimensions (length and width) of the fence?
*January 4, 2013*

**math**

A rectangular field is 35 m longer than it is wide. The length of the fence around the perimeter of the field is 290 m. What are the dimensions (length and width) of the fence?
*January 4, 2013*

**ap chem**

What type of experiment can be done to determine if a material is paramagnetic?
*January 2, 2013*

**ap chem**

in a sigma antibonding orbital where are the electrons most likly to be found in relation to the nuclei in a bond?
*January 2, 2013*

**ap chem**

The allene molecule has the following Lewis structure: H2C=C=CH2. Are all four hydrogen atoms in the same plane? The allene molecule has the following Lewis structure: H2C=C=CH2. Are all four hydrogen atoms in the same plane? If not, what is the spatial relationship? Explain. ...
*December 28, 2012*

**Math**

The length of each side of an equilateral hexagon is a whole number, and the length of each side of an equilateral octagon is a whole number. Both have the same perimeter. The perimeter must be a multiple of 16 ,18, 24,30 or 36 ?
*December 20, 2012*

**calc volume**

find the volume of a solid formed when the region bounded by y = e^(x-3) and y = 1 + ln(x) is rotated about the y-axis.
*December 19, 2012*

**math**

x(x+2)= 35 x^2 + 2x - 35 = 0 (x - 5)(x - 7) = 0 x = 5, 7
*December 17, 2012*

**math**

There are two 100-foot poles. A 150-foot rope connects them at the top. The bottom of the rope hangs to 25 feet from the ground. How far apart are the poles?
*December 17, 2012*

**math**

jake jumped 3 feet. Marco jumped 5 feet. Peter jumped 4 feet. How much farther did Jake and Peter than MArco? Explain how you found your answer.
*December 10, 2012*

**Math **

Find the value of each expression using the pemdas method. 5(to the second power)+8 divided by 2
*December 9, 2012*

**physics**

Two particles A and B have velocities 3^i and v^j respectively (in m/s). (a) Find rBjA; the position of B relative to A for all t given that rBjA(t = 0) = 9^i + 6^j (in metres). (b) Find the value of v such that A and B collide. (c) If v = 1 m/s, nd the time and distance when ...
*December 6, 2012*

**Physics- Elena please help!**

Junior in College
*December 5, 2012*

**Physics- Elena please help!**

I don't understand how to do it, you dont need to be mean about it. I am asking for someone else's help.
*December 5, 2012*

**Physics- Elena please help!**

An interstate highway has been built though a poor neighborhood in a city. In the afternoon, the sound level in a rented room is 114.0 dB as 172 cars pass outside the window every minute. (a) What is the sound intensity during the day ? (Reminder: If you choose to use ...
*December 5, 2012*