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

92,096 questions, page 571
1. physics

if 12,000 j of work is used to raise a large crate to a 4.1 m high shelf in a warehouse, then what was the weight of the crate of newtons?

asked by Anonymous on February 29, 2012
2. math

Have you seen any graphs in a meeting at work or in a business situation that you thought were useful? Do you think graphs are useful for describing functions, or do they have the potential to cause even more confusion?

asked by shaloo on August 8, 2011

home work paper says: On the back:cut out a letter. make a motion pattern on the back. I am clueless please help.

asked by eric on April 20, 2010
4. math

The data in the table are linear. Use the table to find the slope. X| 2| 4| 6| 8 Y| 1|-2|-5|-8 A. 3/2 B. -3/2 C. -2/3 D. 2/3 Please help me work this out I don't know how to do this kind of stuff. Thank you in advance.

asked by blue on April 25, 2015
5. Physïcs

A body is displaced through a certain distance x by a force of 30 newtons.if the work done is 100 joules and the displacement is in the direction of force,what is the value of x?

asked by CHIDIEBERE on January 31, 2016
6. English

In academic writing, introductions must include a thesis statement. 1.True 2.False I think it true, please recheck my work

asked by Julie on July 9, 2016
7. physics

a mass of 9.6 kg is moving horizontally as a force of 2.3 N , directed at 21° below the horizontal , is exerted on it , when the speed is 7.9 m/s, what is the rate at which the force is doing work

asked by riham on April 25, 2015
8. physics

while rowing in a race, john uses his arms to exert a force of 165 N per stroke while pulling the .80 m. how much work does he do in 30 stroke?

asked by Anonymous on February 12, 2015
9. Physics

A car of mass m = 1450 kg is traveling at a speed of v0 = 79 km/h (21.9 m/s). Calculate the work that must be done by the brakes to completely stop the car in kJ

asked by Nate on May 27, 2012
10. Random?

When students do a drawing in class, why is it important for them to share their piece of work with the rest of the class? (why is this good for the student)

asked by Hailey on September 26, 2010
11. what is

1.3 /73.814 In significant digit notation, divid, and the answer to two significant digits. I will be happy to critique your work.

asked by kme on August 31, 2005
12. Math

How do I work this math prob. I always have a B and would like to bring it up. Caan you PLEASE help me with this prob. on unit rates "\$2 for 5 cans of tomato soup"

asked by Sarah on January 10, 2011
13. Physics

If 6.40 x 10^-19 joule of work is required to move a proton between two points A and B in an electric field, what is the potential difference between points A and B? Given: W = 6.40 x 10^-19

asked by Priscilla on February 5, 2010
14. WORK~PHYSICS

A crate is dragged 15m along a horizontal surface by a rope which makes an angle of 37° with the horizontal. How much work is done? Please help me with this question.

asked by BOOKER PERRY on October 9, 2012
15. Maths

The scale on a map is 1:200 000. Work out the number of kilometres represented by 2.5 cm on the map. I've never done a question like this before. If you can help I would be really grateful.

asked by Alice on March 4, 2017
16. Physics

A constant force of 35.9 N, directed at 28.7o from horizontal, pulls a mass of 14.7 kg horizontally a distance of 3.41 m. Calculate the work done by the force.

asked by Kristen on October 20, 2013
17. Science

Why must chromosomes be duplicated before mitosis? DNA is the instruction of making proteins.To have a new cell that can work, it must has a replication of DNA.

asked by Shay on September 13, 2006
18. physics

A student pushes on a desk with a horizontal force of 125 N and moves the desk 3.2 m directly across the floor. How much work is done?

asked by Patti on December 1, 2011
19. physics

Find the work for an isothermal expansion of 3.08 mol of an ideal gas at temperature of 18oC from pi = 4.55 atm to pf = 3.32 atm.

asked by serena on November 18, 2010
20. Physics 11

A businesswoman is applying a force of 12.0 N [upwards] to carry her briefcase for a horizontal distance of 200.0 m. How much work is she doing on the briefcase?

asked by Rayan on April 3, 2017
21. Science

What is a 12 letter work that has a t as its 5th letter that means an observstion involving desctriptions based on instrunent measurments.

asked by Madison on September 17, 2007
22. English and grammar

i need someone to check my work but i cant just copy it and paste it here. i need to send it via e-mail. please give me your email add and ill send it to you. thanks

asked by john on November 25, 2012
23. Physics

A body is displaced through a certain distance X by a force of 30N. If the work done is 100J and the displacement is in the direction of force, what is the value of WWWW?

asked by GBOROGEN on January 19, 2019
24. Physics

The third floor of a house is 9 m above the street level. How much work (in kJ) is required to lift a 700-kg piano to the third-story level?

asked by Bruin on July 3, 2012
25. General Physics

A spring with spring constant of 28 N/m is stretched 0.2 m from its equilibrium position. How much work must be done to stretch it an additional 0.06 m? Answer in units of J

asked by Charles on July 26, 2013
26. Physics

If you do 12 J of work to push 0.001 C of charge from point A to point B in an electric field, what is the voltage difference between points A and B?

asked by Larry on April 30, 2012
27. Science

A chain that is 30 m long and weighs 120N.m hangs from the drum of a winch. Determine the work to wind the first 9m of the chain .

asked by Yolanda on July 3, 2019
28. Science

I need to observe and identify variables and I'm in 6th grade!!! Help, this work is killing me....It's scenario 1-4 and I have Mr Jones plz help plz

asked by Destiny on August 31, 2012
29. physics

An airplane passenger carries a 250 N suitcase up the stairs, a displacement of 4.70 m vertically, and 5.30 m horizontally. How much work does the passenger do?

asked by ian on November 16, 2011
30. physics

A hockey player lifts a 600 g trophy up into the air a distance of 75.0 cm. The work done against gravity on the trophy is __________ J.

asked by help on July 31, 2014
31. Physics

A machine require 100J of work to raise a load of 500N through a vertical distance of 1.5M CAL the of the machine

asked by COVENANT on March 11, 2019
32. physics

How much work would be done if a 50 kg block was pulled horizantally at a 30 degree angle to the horizantal for 10 meters. a) With zero friction b) With -100N friction

asked by Anonymous on November 28, 2011
33. english

i am crying because i need a story please give me a story and it has to be 2 pages long but the site that mrs.sue or who ever gave me it did not work

asked by savvanah on August 23, 2010
34. vector calculus

(a)Find the work done by the field F= yi+zj+xk in travelling around the curve X^2+y^2=4, z=0. (b) state stokes theorem and verify it for the field F given in (a), over the disc x^2+y^2

asked by forest on August 5, 2011
35. science

which layer is the atmosphere a part of? crust mantle inner core outer core I've looked around in my work and i can't find it can i get some help please

asked by sans the skeleton on January 7, 2019
36. math

you earn \$7.25 per hour. You work 4 1/2 hours each day for 3 days each week. How much money do you earn in two weeks? PLZZZ HELP!!!

asked by JUMBI on January 9, 2019
37. physics

a spring with a spring constant 30.0 N/m is stretched 0.200 m from its equilibrium position. How much work must be done to stretch it an additional 0.100 m?

asked by Tony on December 12, 2010

Does affirmative action programs, reverse discrimination and criteria of comparable are appropriate remedies of discrimination in a work atmosphere?

asked by guest on May 24, 2008
39. Computers in Business

I am in need of help with Microsoft Office Access 07. I am trying to set relationship tables and I have to enforce referential integrity on all 4 of my tables and cannot get it to work. What do I need to do? Thanks

asked by Melinda on April 22, 2008
40. physics

a 5 kg box slides a 10m distance on ice. if the coefficient of kinetic friction is .20, what is the work done by the friction force?

asked by alana on January 6, 2011
41. Career Research and Decision Making

jermaine wants to find a career that involves a lot of physical activety and risks. For jermaine exciting work is?

asked by bob on May 13, 2016
42. sam k.d

a charge 5mc is placed at a point. What is the work required to carry 1C of charge once round it in a circle of radius 12cm.

asked by Anonymous on April 4, 2017
43. Science

a)How much work is required to lift a 35-kg object from the ground 3.0 m into the air? b) How much gravitational potential energy did this object gain?

asked by Annie on June 6, 2014
44. physical science 101

A box of mass 7.0kg is accelerated from resr across a floor at a rate of 4.0m/s2 for 5.0s. Find the net work done on the box.

asked by Tally on August 11, 2011
45. physics

Assume your mass is 80 kg. The acceleration due to gravity is 9.8 m/s 2 . How much work against gravity do you do when you climb a ﬂight of stairs 2.3 m high?

asked by Anonymous on January 20, 2012
46. P-Chem

I am a bit confused on working this problem: Given that the work function (ƒÖ) for a metal is 1.82 eV, calculate the threshold frequency for this metal.

asked by suzane on September 15, 2011
47. science

an 800 N box is push across a level floor for a distance of 5.0 meters with the force of 440 N.how much work is done for the box?

asked by juls on July 2, 2014
48. Math

The sum of two numbers is s. If one of the numbers is n, the second number can be expressed as? I will be happy to critique your thinking or work. what are polygons with the same size

asked by Pam on April 11, 2007
49. Trigonometry

A tree is 5.8 metres tall and casts a shadow, the Suns elevation is 55 degrees, what length is the shadow? How do I work this out please?

asked by Meika on October 20, 2016
50. Physics

It took a force of 262. N to pull a crate weighing 765 N across the floor. The work done was 3500. J. How far was the crate moved?

asked by Anonymous on March 26, 2015
51. English

How does the author portray the issue in the work The Necklace? Just need a good website to help me. I am terrible at trying to find good websites.

asked by Zimny_YoonSanha on November 29, 2018
52. physical science

a force used to lift a 12-kilogram mass to a height fo 8 meters in 2 seconds does 1040 joules of work. how much force is used.

asked by reba on January 2, 2011
53. Humanities

I need the name of a 20th century figure whose work/artistic contributions can be classified in both the age of modernism and the age of pluralism

asked by Danni on March 6, 2008
54. child development 2

English lesson in which students relate a text to a real-world problem If I work with special needs students, what could I do?

asked by Reina Bonilla on April 16, 2016
55. math

you have apple, mapple, oak, poplar, and spruce trees. about how many different groups can u make with three different trees? please help this is alot of work and i have until 4;45 to get it all done!

56. physics

the mass of the boy is 70kg. calculate the force in newtons acting on the boy due to his deceleration. how do i work this out

asked by evie on March 31, 2012
57. Mathematics

karen exchanged BDS\$ two thousand dollars and received EC\$ two thousand seven hundred calculate the value of one BD\$ in EC\$ I would just like the formula so i can work it out please

asked by INDIANA on June 26, 2012
58. Physical Science

A force of 60N used to push a chair across a room does 300J of work in half a minute. How far does a chair move?

asked by ME on February 17, 2013
59. Trigonometry

A tree is 5.8 metres tall and casts a shadow, the Suns elevation is 55 degrees, what length is the shadow? How do I work this out please?

asked by Meika on October 19, 2016
60. Physic

A body was lifted 2m above the ground and then dropped. It hit the ground with 5 kg of kinetic energy. How much work was done to lift 2m Someone please help I'm stuck

asked by Amy on June 27, 2013
61. Human services

•2 examples of Learning theories that you would see in your work in the human services field. Please provide examples to support your statements

asked by Anonymous on August 27, 2013
62. Physics (heat)

A coal sample yields 1.25 X 10^4 Btu/lb. How many foot-pounds of work result from burning 1.00 ton of this coal?

asked by Justin on November 3, 2014
63. Math

Prove the theorem that if limx¡úd h(x)= P and limx¡úd k(x) = Q and h(x) ¡Ý k(x) for all x in an open interval containing d, then P ¡Ý Q by using the formal definition of the limit, showing all work.

asked by Buster on March 12, 2012

If a woman lifts a 19.3 kg bucket from a well and does 6.10 kJ of work, how deep is the well? Assume that the speed of the bucket remains constant as it is lifted

asked by Megan on February 7, 2011
65. welkin

a block of mass 50kg just slide distance of one metre if the coefficient of friction between their surface is 0.2,then work done against friction is

asked by iqbal on September 29, 2015
66. Chemistry

The density of oak lumber is approximately 800km/m^3. What is the mass in grams of 4 cubic meters of oak? And the work.

asked by Maryanne on September 30, 2010
67. physics

how much work (in ft lb) is done by a large bucket that can lift 4.5 ton of dirt 14 ft into the air and dump it into a 5.0 yd cubed dump truck?

asked by carol on November 23, 2013
68. physics

3.54 x 10^2 J of work is done to speed up a 1.22 x 10^2 kg log rolling along the ground. If the log was originlly moving at 2.3 m/s, determine how fast it ends up going.

asked by Abby on December 7, 2012
69. religion

who do members of the Jesuit Volunteer Corps work for?I need help,been stuck on this question for,like,15 minutes,I've been searching the internet for 20 minutes.

asked by sierra on September 28, 2014
70. Physics

Work is done on an object of mass 2kg to increase its kenetic energy to 18J. Calculate the speed of the object.

asked by Anonymous on February 17, 2013
71. physics

A 15 kg block is pulled 5 m across the frictionless floor with a force of 62 N at a 41 degree angle. Calculate the total work done on the block.

asked by Courtney on January 18, 2012
72. physics

A constant force of 48.7 N, directed at 34.1° from horizontal, pulls a mass of 15.1 kg horizontally a distance of 2.77 m. Calculate the work done by the force.

asked by help on November 21, 2010
73. HTML homework

Hey guys, I need some help creating a homepage and 1 extra page, if anyone can help me I'll send you our work page file from wordpad. Thanks

asked by Brent on September 30, 2008
74. Literature

These questions regards "Rules of the Game" by Amy Tan. 1. What did Tan find most awarding about the transformation of her work to film?

asked by Anonymous on February 10, 2014
75. Thanks for all you do! <3

You all work so hard to help us and a lot of us say a simple, "Thank you." or "I really needed this, Thanks!". I think you deserve a lot more but of course, I can't do anything about this since I'm just a student. So I'll just say thank you like everyone

asked by A Grateful Student on December 5, 2018
76. Physics

A mountain climber is about to haul up a 50m length of hanging rope. How much work will it take if the rope weighs .624 N/m?

asked by T.J. on May 2, 2014
77. physics

If a woman lifts a 16.2 kg bucket from a well and does 6.33 kJ of work, how deep is the well? Assume that the speed of the bucket remains constant as it is lifted.

asked by Chris on October 1, 2013
78. social studies 7th grade

School from old times that would hit kids stick if they talked back or out of turn if they had messy work they would hit them

asked by DJ on August 27, 2009
79. Physics

A 1760 kg car accelerates uniformly from rest to 8.8 m/s in 4.52 s. Find the work done on the car in this time. Answer in units of J.

asked by Dave on February 27, 2011
80. College

Any organization that produces a good or service can be classified as a business. True or False I say true. Please check my work.

asked by Tim on November 5, 2016
81. Physics

A refrigerator does 18kJ of work while moving 115 kJ of thermal enegy from inside the refrigerator. What is its coefficient of performance?

asked by Q on November 22, 2012
82. statistics

help me work out the problem to calculate the difference means distribution parameters n(1)=25, n(2)=36 s(1)square=50, s(2) square=72, M(1)=100,M(2)=105

asked by Cherelle on January 18, 2013
83. pre algebra

I have a problem and I would like to know how to work out the problem to get the answer. Write an algebraic expression for each phrase product of m and n -2 What are the steps in working this out?

asked by Theodore on October 27, 2009
84. chem

the work done by a gas when it expands to 96 L is 4100 J. if the external pressure is 2.0 atm, determine the initial volume of the gas.

asked by bekah on October 16, 2014
85. Physics

PLEASE HELP. a 1000 kg car is coasting down the highway at 20 m/s. How much work do friction and air resistance do in bringing the car to rest?

asked by Ritzi on March 10, 2014
86. physics

A 1.13 × 103 kg car accelerates uniformly from rest to 10.6 m/s in 3.22 s. What is the work done on the car in this time interval? Answer in units of J

asked by Brett on December 16, 2012
87. Math

I spend 3/4hour doing homework and play 2/3hour hoe much time I speak on doing home work and play

asked by Girish on June 24, 2017
88. Calculus

Question: gyazo.com/c8fe92564a8387ffc127233f6ad989a9 My work: gyazo.com/27caca9994d03409268162130c61ce08 (I understand how to do trapezoidal approximation, but how would I go bout this while using only 4 sections?)

asked by Matt on February 24, 2019
89. math

a 3 cm by 3 cm by 3 cm cube is painted all over its outside and is then cut into 27 smaller cubes. How many of these small cubes have paint on more than one face? please explain how you work it out,thanks

asked by karen on February 10, 2013
90. AP Calc

Find the point on the curve x=4y-y^2 where the tangent to the curve is a vertical line. My work: Finding the derivative. 1=4(dy/dx)-2y(dy/dx) 1=dy/dx(4-2y) dy/dx=1/4-2y Therefore, y cannot equal +2 or -2 Right?

asked by David on October 6, 2014
91. chemistry

A piston has an external energy of 8.00atm. How much work has been done if the cylinder goes from volume of 0.140 liters to 0.450 liters.

asked by Anonymous on September 30, 2012
92. Physic

How much work W is required to accelerat a 1000kg object from initial velocity of 100m/s to a final velocity of 200m/s?

asked by Cynthia. Rodgers on April 5, 2013
93. English

what are some differences of the work of Walt whitman " I hear america singing" & Woody Guthrie " This land is your land"..?

asked by David on January 4, 2012
94. physical science

If a 500-lb piler driver is raised to a height of 12 feet then dropped how much work was done on the pile driver in raising it?

asked by tee on April 20, 2010
95. Math

Find the point on the curve x=4y-y^2 where the tangent to the curve is a vertical line. My work: Finding the derivative. 1=4(dy/dx)-2y(dy/dx) 1=dy/dx(4-2y) dy/dx=1/4-2y Therefore, y cannot equal +2 or -2 Right?

asked by David on October 6, 2014
96. calculus

A constant force of 60,30− pounds moves an object in a straight line from the point )0,0( to the point)10,10(−. Compute the work done.

asked by mo on April 4, 2009
97. physics

It takes 222 kJ of work to accelerate a car from 22.1 m/s to 29.9 m/s. What is the car's mass?

asked by Anonymous on April 9, 2013
98. nothing

just wanted to say good luck with the school week and work week everybody.

asked by TayB on November 16, 2015
99. physics

What force would be required for Steve to do as much work when he pushes at ϕ=40∘ as when he pushes in the ϕ=0 direction?

asked by Anonymous on March 18, 2019
100. ecology

how do i make a number period if i am given a grid and a number of different numbers to work with?

asked by alexa on February 6, 2008