# Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

91,718 questions, page 605
1. ## Math

Use the compound interest formula A=P(1+r)^t and the given information to solve for r. A=9,000,000 P=80,000 t=40 I have done this problem over a over and still get the wrong answer.

asked by crazy8 on October 23, 2011
2. ## physics

A force of 50.0N is used to stretch an elastic so that it had 40.0 J of elastic potential energy. Through what distance was the elastic stretched? F= 50.0N ?? how do i solve.. ugh!

asked by chyanne on April 29, 2008
3. ## Math

The tornadoes have won 75% of their games. If they their next 4 games, their win percentage goes up to 80%. How many games have they played right now? (Please explain how to solve this problem)

asked by Selina on July 20, 2016
4. ## math

I can't solve this one: The second term of an arithmetic sequence is 24 and the fifth term is 3.Find the first term and the common difference. How could I get the answers if there's only two given numbers?

asked by maiah on June 27, 2016
5. ## algebra

Use the compound interest formula A=P(1+r)^t and the given information to solve for r. A=9,000,000 P=80,000 t=40 I have done this problem over a over and still get the wrong answer.

asked by beth on October 23, 2011
6. ## MATH.

I need help to solve this Equation using the Scientific Calculator Z= Square Root (47 Ohm)2 + (100 Ohm)2= 110 Ohm.

asked by UNKNOWN. on June 3, 2010
7. ## Electricity and Electronics

if the resistance of an circuit is 12 ohms and the voltage in the circuit is 60 V, the current flowing through the circuit is? Are you talking d.c.? E = IR, solve for I and I = E/R E = 60 V R = 12 ohoms

asked by jackie on June 15, 2006
8. ## Physical Science

The potential energy of an apple is 6.00 joules. The apple is 3.00-meters high. What is the mass of the apple? Please help! I have no idea how to solve this. :(

asked by Help! on September 26, 2017
9. ## Math

For questions 1 and 2 choose the equation or proportion that you can use to solve the problem: What number is 73% of 215? A.215 = 0.73 B.n = 0.73 × 215 C.0.73 = nx215

asked by Johnny McKarron is cool on December 17, 2015
10. ## math

Solve each equation and leave the answer in simplest radical form. x squared+6x-9=0 n squared-2n+2=5 3y squared-4y-2=0 I never learned how to do this. Can you help me?

asked by robert on December 10, 2007
11. ## Math

How do you solve this? I posted this question last night and someone answered but it wasn't the right answer. I have tried so many times and still can't get the right answer. the right answer is suppose to be 15/2 5/6-1/3+ 7/8/(1/2)^3 Thank you for your

asked by Mike on January 22, 2010
12. ## precal

4=2cos(pi/6t-2pi/3)+4 How do i solve this step by step ith justification for each step? super frustratd thankyou

asked by wendell on June 8, 2012
13. ## Pre Calculus

Solve 2cos^2(2x)=1 I divided both sides by 2 and got this cos^2(2x)=1/2 But then I didn't know what to do after that... The part that has me stumped is that it's a cos^2(2x) not just a cos^2x. Any advice on what I should try next?

asked by Chris on May 8, 2013
14. ## math

Solve the proportion using cross products. 20 Miles 15 Miles ________ = __________ 50 Miles h Hours Please Answer!!!!

15. ## Math

Solve for the interest acured on a 520 investment after 4 years that has an interest rate of 4.9% per year, simple interest.

asked by Courtnie on June 16, 2013
16. ## Trigonometry

Solve each equation for theta, giving a general formula for all of the solutions: a. tan(theta)=-1 b. sin(theta/2)=1/2

asked by Alex on March 28, 2015
17. ## math

i need to integrate: (secx)^4 dx let u = sec x dv =sec^3 x dx Start with this. Then, you will have to deal with the integral of sec. You should be able to solve it after a few steps. Looks a little messy.

asked by Jake on February 1, 2007
18. ## history

“We owe it, therefore, to candor and to the amicable relations existing between the United States and those powers to declare that we should consider any attempt on their part to extend their system to any portion of this hemisphere as dangerous to our

asked by lilkakes on January 10, 2019
19. ## health care

response to the following: Computer technology continues to make rapid advances. Health care facilities have used computer programs for administrative functions such as payroll and billing. How do health care facilities use electronic (or computerized)

asked by Tj on September 2, 2009
20. ## physics

A 0.330-kg block of wood rests on a horizontal frictionless surface and is attached to a spring (also horizontal) with a 29.5-N/m force constant that is at its equilibrium length. A 0.0600-kg wad of Play-Doh is thrown horizontally at the block with a speed

asked by HELP!!! on November 30, 2012
21. ## Physics

In a physics lab, Kate and Rob use a hanging mass and pulley system to exert a 2.45 N rightward force on a 0.500kg cart to accelerate across a low-friction track. If the resistance (ignore air resistance) force to the motion of the cart is 0.72N, then what

asked by Anon on July 3, 2019
22. ## physics

Telephoto lenses allow one to "zoom in" on distant objects, making them bigger. A particular telephoto lens consists of a combination of two thin lenses having focal lengths of f1=20 cm and f2=−8 cm, respectively. The lenses are separated by a distance

asked by Anonymous on July 19, 2013
23. ## physics

Telephoto lenses allow one to "zoom in" on distant objects, making them bigger. A particular telephoto lens consists of a combination of two thin lenses having focal lengths of f1=20 cm and f2=−8 cm, respectively. The lenses are separated by a distance

asked by andy on July 17, 2013
24. ## physics

Telephoto lenses allow one to "zoom in" on distant objects, making them bigger. A particular telephoto lens consists of a combination of two thin lenses having focal lengths of f1=20 cm and f2=−8 cm, respectively. The lenses are separated by a distance

asked by andy on July 17, 2013
25. ## Physics

Telephoto lenses allow one to "zoom in" on distant objects, making them bigger. A particular telephoto lens consists of a combination of two thin lenses having focal lengths of f1=20 cm and f2=−8 cm, respectively. The lenses are separated by a distance

asked by Danny on July 16, 2013
26. ## accounting

Can someone please check my answer to the following question. Jill bought 500 shares of stock on October 22,2005 for \$30,000. On March 25, 2006 she gave half the shares to her sister when the fair market value was \$55 per share. If Jill's sister sells the

27. ## Computer science(Information Retrieval Architectur

Stemming: a. Compare advantages and disadvantages of Porter Stemming algorithm, Dictionary stemming algorithm and Success Variety stemming algorithm. b. Create the symbol tree for the following words (canopy, cars, cabony, cabossy, cabort, cabins, cabity,

asked by Nany on April 27, 2015
28. ## Geometry

A city has a scale model of the solar system nearly 6 km long. The model's scale is 1 km : 1 billion km. a. Earth is 150,000,000 km from the Sun. How many meters apart are Earth and the Sun in the model?

asked by Anonymous on December 30, 2011
29. ## Math

this a system of equations A merchant decides to mix peanuts worth 5.25 per pound and trail mix worth 2.75 a pound to make a 10 pound mixture worth 4.75 per pound. how many pounds of each should his mixture contain? please help me.

asked by Keonn'a on October 16, 2018
30. ## differantiation

Determine dy/dx if: (i) Y= sqrt x^sqrt x (ii) Y= xarcsin(x) + sqrt(1-x) Please show all steps. Thanks 1) http://www.analyzemath.com/calculus/Differentiation/first_derivative.html 2) an antiderivative of arcsin(x) is xarcsin(x)-sqrt(1-x^2); are you certain

asked by Ruth on August 12, 2006
31. ## US History

"...To make all Laws which shall be necessary and proper for carrying into Execution the foregoing Powers, and all other Powers vested by this Constitution in the Government of the United States, or in any Department or Officer thereof." This clause was

asked by maczindahouse on April 8, 2019
32. ## STATISTICS

Pure Plastics Inc. manufacture molded plastic pieces. A sample of their raw material inventory is shown in the table below: Item Average Inventory (units) Value (\$/unit) 128 400 3.75 234 300 4.00 233 120 2.50 236 75 1.50 239 60 1.75 240 30 2.00 678 20 1.15

asked by cheryl on November 13, 2011
33. ## history

What was the role of civil service examinations in Ming China? does anyone have any idea what the answer could be. I was looking on the internet and found this- --The civil service examination system, a an effective cultural, social, political, and

asked by Victoria on February 21, 2014
34. ## operations management

Pure Plastics Inc. manufacture molded plastic pieces. A sample of their raw material inventory is shown in the table below: Item Average Inventory (units) Value (\$/unit) 128 400 3.75 234 300 4.00 233 120 2.50 236 75 1.50 239 60 1.75 240 30 2.00 678 20 1.15

asked by cheryl on November 11, 2011
35. ## History

Which accurately describes the Columbian Exchange that resulted from the Age of Discovery? the economic system employed by Europeans national to control trade and increase wealth the exchange of Indian captives in return of gold by Columbus and his men on

asked by malia on October 26, 2017
36. ## Government

1. How is the I.S. constitutional government designed? Select 2 that apply. - The Judicial System is controlled by the legislature - the three branches of government can check and balance each other - Powers not given to the federal government are reserved

asked by Lexi on September 29, 2016
37. ## Algebra 2

The sum of a few numbers if 30, the first number is 2 less than the second, and the third is 4 less than the first. What are the order of numbers and what are the numbers? This is a post by one of my classmates that I'm supposed to solve. I'm probably

38. ## MATH

Alexis separated her pictures into 3 piles. Each pile contained 9 pictures. How many pictures did she have in all? Write and solve equation. Answer to my problem: 27=9p p=3

asked by Nichelle on January 15, 2015
39. ## help with trigonometry??

Jacob is standing 112 m from a building. The angle of elevation when he looks up to the top of the building is 62°. How tall is the building? I don't really understand how to solve this, please help!!

asked by Valerie on January 24, 2017
40. ## ALGEBRA

Solve the exponential equation. Give the exact value for x. (Express all logarithmic functions in terms of ln(x) in your answer.) text((a) ) e^x = 10 x = text((b) ) e^x = 2.0 x = text((c) ) e^x = 37.9 x =

asked by Randy on April 25, 2012
41. ## Math

Need to know the formula for find the perimeter. Need to solve this problem. A square metal box has a perimeter of 8.32". If the sides are .04" thick what is the perimeter of the inside?

asked by Dale on September 21, 2009
42. ## plz help me out** math

find a number such that 14 less than three times the number is 25. i think u subtact 14-3n=25 14-3n=25 won't get it. That gives a negative number. Try 3n-14=25. Solve for n. Im in algebra the answer is 14-3n=25.Promise me always get these problems right.

asked by valerie* on November 6, 2006
43. ## calculus

hi, how do u solve this problem using limit notation. I tried it but go stuck at the last part. find f'(x) for f(x)=Sqrt2x-1 using F(x+h)-f(a)/h i got to the end and i got 1/Sqrt2x-1 -sqrt2x-1. i don't know wht u do next? am i right so far?

asked by fred on March 4, 2008
44. ## Homework - Math

This is dividing polynomial by monomials How do yu solve these? 1. 5mn divided by 5m^3n - 10m^2n^2 2. -10a^6 divided by -30a^9 + 20a^7 3. -2a divided by 8a^3 - 4a^2b + 6ab^2

asked by Anonymous on January 6, 2014

Using a scale factor of 1 inch = 16 feet, what are the blueprint dimensions of a room that is 20 feet x 28 feet? A. 1.5 in x 2.5 in B. 1.25 in x 2.25 in C. 1.25 in x 1.75 in D. 1.5 in x 1.75 in Could anybody tell me how to solve this problem, please? I

asked by boi on November 10, 2017
46. ## Algebraic

Determine the roots of the quadratic equation by completing the square. Solve for exact solutions and approximate solutions. Check your solutions. Y=x2-6x-12

asked by rian on March 29, 2016
47. ## algebra1

Help me please!!!! Solve. (–18x3 + 17x + 6) ÷ (3x + 2) (1point) –6x^2 + 4x + 3 6x^2 + 4x – 3 –6x^2 + 4x – 3 6x^2 – 4x + 3 The width, w, of a rectangular garden is x – 2. The area of the garden is x^3 — 2x – 4. What is an expression for

asked by Tommy on May 19, 2014
48. ## cosines

I don't know how to reverse cosine decimals into angles. Can you please explain and help me solve these . cos A= 0.28571428571 A= cos B= 0.66666666667 B= cos C= 0.5238089523

asked by Anon on February 27, 2011
49. ## trigonometry

I need help in understanding how to identify which identity to use. using this question as an example. Show that tan theta (sin theta+cot theta cos theata)all over cos theta = sec^2 theta. Please explain.

asked by lindsay on May 4, 2012
50. ## chemistry

nearest star distance of 4.3 light years proxima centauri is the nearest star to our solar system. what is the distance to proxima centauri kilometers? the speed of light in space is 2.998 x10^8 m/s.

asked by help plz on January 30, 2015
51. ## physics

i am going a center of gravity problem, with the x=w1(x1)+w2x2..../ W1+W2.. and i keep getting the wrong answer can someone please tell me what i am doing wrong this is the problem:Four objects are situated along the y axis as follows: a 1.94 kg object is

asked by Kaity on February 1, 2012
52. ## us history

In many ways after the divisiveness and devastation of the Civil War, the United States searched for order economically, politically, geographically, socially and racially. Select one of these areas, or suggest another, and make a case for the reasons why

asked by kc on December 5, 2012
53. ## Intro Biology

I can't find examples in the book as reference. Please help me with these questions and explain why. 1.) Which of the following has no vascular tissue (“plumbing system”)? A) Conifer B) Angiosperm C) Fern D) Moss E) Ginkgo 2.) Which of the following

asked by Andrew on November 25, 2014
54. ## English (spelling and grammar)/General

I posted my answers to questions that were asked of me. Can someone read over my responses and make any corrections that you see fit? ... Thank you! A. I am currently working at Mohegan Sun as a Wardrobe Attendant. A. I am looking for law enforcement

asked by Manny to ANYONE on January 29, 2008
55. ## Early Childhood Education

I am having a hard time finding article for this assigment? Find an article on one or more strategies that work with young children to promote sociable and acceptable group behavior with peers

asked by Betty on April 16, 2018
56. ## English

Pretend you are a modern social worker, educator, environmentalist, or military advisor to the president. Attack an evil you see the work by writing an ironic proposal and the proposal have to be outrageous

asked by John on April 4, 2013
57. ## physics

A patialy moves along half the circumference of a circle of 1 meter radius. Calculate the work done if the force at any point inclined at 60o to the tangent at that point has 5 New tones magnitude

asked by sunil on July 10, 2012
58. ## physics

a 1462 kilogram block was lifeted vertically at a constant velocity a distance of 0.08 x 10(to the 6th power) meters in 5minutes. A-how much work was done? B-what was the average power consumption in watts?

asked by Jen on May 24, 2012
59. ## Physics

A gun is shot horizontally from a building that is 10 meters high at a velocity of 220 meters/ second: I need to know what Vx is and Vy along with answering Vx after 3 seconds Vy after 3 second. We were given these equations Vy= Vy0-9.8t y= y0+Vy0t-4.9t^2

asked by Anonymous on November 28, 2016

Give an example of when you made an important decision related to school, work, or a business transaction. What elements of critical thinking did you use? How might you improve your decision-making strategies in the future?

asked by Barney on August 21, 2010
61. ## Physics

A 5000 kg space shuttle starts at rest and linearly increases its thrust from 0N to 1000N across a displacement of 2000 meters. Calculate the total amount of work done on the shuttle.

asked by jackie on April 7, 2015
62. ## physics

An 845 N sled is pulled a distance of 180 m. The task requires 1.38 x 104 J of work and is done by pulling on a rope with a force of 122 N. The rope is held at _____° above the horizontal.

asked by Dee on January 24, 2012
63. ## Chemistry

How many moles of helium are contained in a 5.00-L canister at 101 kPa and 30.0 degrees Celsius? I don't understand how to get the answer. My teacher didn't explain the work she just gave me the answer.

asked by Walker on March 9, 2011
64. ## English

asked by anonymous on January 11, 2019
65. ## Calculus derivative

Find the slope and an equation of the tangent line to the graph of the function f at the specified point. f(x)=-1/3x^2+5x+5: (-1, -1/3) Answer: f’(x)=-2/3x + 5 y=-2/3x -1 I re-worked the problem and got f'(x)=5, y=5x+ 14/3 This is from a multiple choice

asked by Steff on June 15, 2011
66. ## English

I have never met anybody famous. AM I CORRECT TO SAY THIS IS Present perfect tense? Also can anybody tell me where I can look at examples of ESA Engage, Study, Activate Lessons? I wish to look at some examples of how they are written up and get my head

asked by Tony on October 29, 2008
67. ## Interpersonal Communication

How does confidence,hard work, unorganization and shyness relate to Interpersonal Communication? I need some example from chapter 1 and 2 from Reflect and Relate 2nd Edition by Steven McCornack. Need help before the end of the day.

asked by Branden on August 6, 2014
68. ## Stats

So i have a test in stats tomorrow and im trying to work on my study guide but im stuck at this question : Construct a confidence interval for the proportion for each case 90 percent interval 861 out of 2500. please help.

asked by Jessica on October 19, 2014
69. ## physics 11

The loaded cab of an elevator has a mass of 3.0 multiplied by 103 kg and moves 161 m up the shaft in 23 s at constant speed. At what average rate does the force from the cable do work on the cab?

asked by rafeh on November 2, 2012
70. ## Art

When creating a collection based on a message, an artist should consider all of the following except A. the audience the collection will the presented to B. the subject matter they most prefer using as a reference C. the dollar amount they wish to sell it

asked by Caroline on January 15, 2016
71. ## Physics

Two identical point charges are fixed to diagonally opposite corners of a square that is .5m on a side. Each charge is 3.0E-6 C. How much work is done by the electric force as one of the charges moves to an empty corner?

asked by Bob on October 11, 2010
72. ## Sociology

This is the reason an employer might restrict employee internet access? a. Employees waste too much time on the internet b. viewing certain kinds of sites could lead to a hostile work environment

asked by Chrissy on March 10, 2013
73. ## physics

You’re sanding a table. You must exert a force of 23 N on the sandpaper to keep it moving steadily across the table’s surface. You slide the paper back and forth for 23 minutes, during which time you move it 1090 m. How much work have you done?

asked by olga on February 10, 2011
74. ## physics

what would make you weigh less inside of the empire state building on the ground floor, oppose to outside on the sidewalk. (weighing on a regular bathroom scale)The mass of the building? If so how does that work?

asked by Nichole on November 9, 2008
75. ## math

Ben works 6 hours each day at his job at a local fast food restaurant. He went home sick after working 2 hours. what is the fraction of the 6 hour shift did he Not work?

asked by Anonymous on April 30, 2014
76. ## english

what motivates us as writers and viewers to create and interact with characters through pieces of work such as " a beautiful mind" (movie. This is our essay question. what topic and 3 arguments could i talk about in my essay

asked by sarah on July 9, 2013
77. ## Physics

Two blocks of the same mass are raised up a height of 3m from the ground. One is raised straight up and placed on a pedestal and the other is pushed up an incline with friction to get there. In which case, if either is work more necessary? Which block

asked by Anonymous on November 16, 2010
78. ## physics

In a time of 10s, a 70 kg student runs up 2 flights of stairs whose combined vertical height is 8.0m. compute the student's power output in doing work against gravity in (a)watts and (b)horsepower

asked by Wendi on December 8, 2010
79. ## Language Art (Please Check)

1.C which of the following is a simple sentence? A.she lit a lantern and raced toward the bridge B.the lantern did not work,so she tossed it aside C.buck and minnie were the first horses out of the barn D.she was startled by a sound,which turned out to be

asked by matt on March 16, 2014
80. ## Maths

Hello, I'm supposed to do this questions using concepts of differentiation with proper workings, and not based on general knowledge. Question: If x + y = 82, find the maximum value of xy. I know that 41 and 41 would give the greatest product... but how

asked by Andrea on June 19, 2009
81. ## Criminal Justice/Terrorism

A good thing to remember about a new technology is that it: A. can easily make up for a lack of training. B. can always be updated with new software. C. has been lab tested, so you know it will work in the field. D. can never replace training and judgment

asked by Pat on July 18, 2015
82. ## science

A gas is confined to a cylinder under constant atmospheric pressure, as illustrated in the figure below. When 0.46 kJ of heat is added to the gas, it expands and does 186 J of work on the surroundings. What are the values of ÄH and ÄE for this process?

asked by Samantha on December 17, 2012
83. ## precalculus

can you check my work? In exercises 10-12, sketch the curve represented by the parametric equations. Then eliminate and write the corresponding rectangular equation whose graph represents the curve. 10. x=t2-6 y=1/2t-1 answer: t=2y-6= (2y+2)2-6 =4y2+8y-2

asked by Anonymous on December 14, 2016
84. ## Science

a 500 Newton ballerina did 250 joules of work to lift herself upwars through the air. She landed a total of 2.5 meters to the left after completing her jump. How high did she jump?

asked by Jaisa on March 11, 2009
85. ## Science

you push a 75 kg wooden box at a constant speed. the coeffiecent of kinetic friction between the box and the desk is 0.230. You pull the crate a distance of 8.75 m. How much work was done? Explain steps please//

asked by analicia on January 10, 2013
86. ## Spanish

Dr. Mario Jose Molina won the Nobel Prize in Chemistry for his work studying which problem? a. the ozone layer*** b. deforestation c. the El Nino effect d. the greenhouse effect

asked by Kaai97 on January 20, 2016
87. ## matn

need help with word problem? half add it Find a number such that when added to numerator and denominator of 2/11 yields a fraction equivalent to 1/2? thanks for any help (x+2)/(x+11) = 1/2 x is the number you want. Now do the algebra. I will be happy to

asked by vince on March 8, 2007
88. ## physics

In moving out of a dormitory at the end of the sememster, a student does 1.8 104 J of work. In the process, his internal energy decreases by 4.2 104 J. Determine each of the following quantities (including the algebraic sign). a) W b) U c) Q

asked by Anonymous on February 28, 2013
89. ## Physics

A(n) 80.0-kg student eats a 160-Calorie doughnut. To burn-it-off, he decides to climb the steps of a tall building. How high (in m) would he have to climb to expend an equivalent amount of work?

asked by Anonymous on December 9, 2012
90. ## Health/ Basic Clinical Procedures

please check my answer thanks True or False A physical or mechanical device used to remove healyh hazzards from the work place is called personal protective control I said True

asked by Helana on April 21, 2008

Amazon. com and Toys "R" Us decided to work together to sell toys over the Internet. What decisions would executives from each company have to consider in order to complete this alliance? umm.. prices?? how the money is split up?? what else? Thanks.

asked by sally on November 6, 2006
92. ## Science

you push a 75 kg wooden box at a constant speed. the coeffiecent of kinetic friction between the box and the desk is 0.230. You pull the crate a distance of 8.75 m. How much work was done? Explain steps please//

asked by analicia on January 10, 2013
93. ## writing ASAP-.

i'm work on a book project on ameila earhart.The queston on my book report is ...How is the provied by the author imporant or relatable to today's modern society ?Please tell what this means and give an example.

asked by lauren on November 7, 2009
94. ## Math

Sally invests £8000 in a savings account . The account pays 2.8% compound interest per year . Work out the value of her investment after 4 years . Give your answers to the nearest penny .

asked by B_cant_do_maths on October 6, 2018
95. ## Chemistry

Hey, been trying to work through this but no luck so far: The heat of formation of nitrogen atoms N(g) is 472.7KJ/mol. Is that enough information to determine the N-N bond energy in N2(g)? Is so, what is it in units of KJ/mol? If not, explain why not.

asked by Tyrell on February 10, 2011
96. ## American History

I am writing a research paper on President Abraham Lincoln I have to describe reasons why he was such an influential leader. I need at least 3-4 main ideas to work with on this paper and so far I only came up with one..he ended slavery...any suggestions?

asked by Lily on February 18, 2008
97. ## Oganizational Behavior

a form of intrinsic motivation rooted in the belief that work tasks contribute to some larger purpose is know as: a. self efficacy b. goal commitment c. goal setting d. psychological empowerment

asked by Anonymous on October 22, 2013
98. ## Nursing

. Ralph is having a colonoscopy and brings paperwork to excuse him from work with pay. Which of the following protects the information disclosed in this paperwork? A. Authorization B. Minimal disclosure C. Safeguards D. Minimum necessary standard B

asked by blue on February 24, 2019
99. ## math

As a fundraiser students had to raise \$1200. They will sell popcorn ,at the gameshistory shows that there are usually 120 bags of popcorn sold each game. how much money should they charge if they work 6 games?

asked by janice on April 21, 2009
100. ## physics

A 16.0-N weight slides down a rough inclined plane that makes an angle of 28.0° with the horizontal. The weight, which started from rest, gains a speed of 15.0 m/s after sliding 150 m. How much work is done against friction?

asked by Alexandra on August 29, 2012