# 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 637
1. ## physicsa 6a

A charge of 28.0 is placed in a uniform electric field that is directed vertically upward and that has a magnitude of 4.00×104 . What work is done by the electric force when the charge moves

asked by Sally on May 18, 2010
2. ## Functions

janice gets a job and starts out earning \$9.25 her boss promises her a raise of \$0.15/h after each month of work. when will janice start earning at least twice her starting wage?

asked by AQIB KHAN on December 25, 2016
3. ## Flash-card maker?

Does anybody know of an online flashcard maker you don't have to print out that you can study online? Americangirl . com has a flash-card maker, but it doesn't work anymore.

asked by Emily on October 18, 2007
4. ## math

An electric motor that rated at 5 horse power can produce _____ in equivalent work. 0.007 watts 5 watts 17.05 watts 3730 watts

asked by simon on December 13, 2017
5. ## PHYSICS

A box of mass m=20kg is to be pushed up the inclined plane by a horizontal force F at constant speed. of μk= 0.2, find the work done on the box by the force F?

asked by Francis Valois on February 16, 2016
6. ## Calc 121

Okay, how would you go about finding the area of a curve from 1 to 4, when y=2x+(2/(x^2))?? It's not like the problem I asked before because here, you cannot use substitution. I tried using 2x for u and x^2 for du but it won't simplify into a ln problem or

asked by Me on April 21, 2007
7. ## didnt get to finish

0.40= ______ 130 the slope of a street is 0.40 how many feet vertically does it rise over a horizontal diastance of 130 feet I don't know how to work this problem

asked by pam on October 21, 2011
8. ## Physics

Bruno drags a box with a mass of 50-kg along a frictionless floor by pulling the box with 18-N at an angle 40° above the horizontal. What is the net work done on the box if the displacement of the box is 10.5-m?

asked by Tianna on February 19, 2013
9. ## Art Appreciation

Olympia and Ophelia and the Artists’ Reflections. Compare Manet’s Olympia to Millais’s Ophelia. Discuss how each work represents the artist and his period.

asked by Deann Morgan on February 16, 2011
10. ## Math limits

lim as x --> infinity ( 4x + (3 / x^2) ) My work: (4x^3 / x^2) + (3 / x^2) (4x^3 + 3) / x^2 degree of top > degree of bottom No horizontal asymptote, so the limit does not exist The correct answer is infinity. How?

asked by Paige on October 23, 2016
11. ## Physics

A commercial heat pump has CP=3 when the indoor temperature is 20°C and the outdoor temperature is 6°C. How much work is required to operate it if 3*10^6J of heat must be transferred to the room each hour?

asked by Anonym on April 11, 2017
12. ## math

Ms Writeacher my math work book which is a fifth grader Harcourt Math Practice Workbook does not say what Tues so my mon think it has to be the same Tues in the week of the other days

asked by charlie on March 9, 2009
13. ## science

Gravity accelerates objects downward at 9.8 m/s. How much downwards force does the man generate with each step he takes? how much work is performed when gravity pulls him down 0.5 m after each step?

asked by cam on November 1, 2007
14. ## Math Calc 1

Word Problems >:( A cylinder tank of water is laying on it's side. Radius is 2 and height is 10. How much work is required to pump all of the water out of the tank?

asked by Anonymous on December 12, 2012

Our large companies seem to be largely run by hired managers who work for salaries and who are not owner-entrepreneurs. How then do we get the profit motive into large companies?

asked by Jonathan on September 15, 2013
16. ## Math

A car travels 480 miles on 15 gallons of gasoline. How many miles does the car travel per gallon? My work Myself shows the answer is 32 mi/gal

asked by Taylor on September 17, 2015
17. ## HTT 200

in 200 to 300 words, for which department you would rather work. Which department do you feel is the most important? „h Provide two examples of why it is important to know information about areas other than the one you have chosen.

asked by Anonymous on June 21, 2009
18. ## physics

An engine does 17700 J of work and rejects 6320 J of heat into a cold resevoir whose temperature is 283 K. What would be the smallest possible temperature of the hot resevoir?

asked by Anonymous on November 6, 2012
19. ## Chemistry

A laser emitting light with a wavelength of 480 nm is directed toward the surface of rubidium metal. The work function for rubidium metal is 2.16 eV (1 eV = 1.602 x 10-19 J)

asked by Charles on November 16, 2010
20. ## math

Alyson works part time at a restaurant each week her work schedule changes. the number of hours she works each week is shown MAD 10,24,15,23,14,23,19,7,14,28,20,6,14,15

asked by Star on April 18, 2019
21. ## Math

A rectangle's length and width is a ratio of 17:2. The area is 136 square yards. What is the length and width. I have no idea on how to even attempt to work this problem. Please help!

asked by Mak on December 14, 2016
22. ## Careers

I want to become a Construction engineer when I am older. In class I have to make a presentation about wanting to become a Construction Engineer, the only thing I can't find is how long you have to go to college to be able to do this work. Can you help me?

asked by Haile on October 10, 2017
23. ## physical science

A nail is driven into a board to a depth of 1.00 cm with one strike from the hammer. The hammer striking the nail hit it with a force of 200.00 Newtons. How much work was done?

asked by kelli on May 1, 2013
24. ## Chemistry

Could you please tell me how to work out the net balanced equation of 'aqueous solutions of sodium sulfate and barium nitrate when they are mixed?' *Do we just ignore sulfate and nitrate???????

asked by Alloush on April 5, 2010
25. ## Math

3x-2 over 2 (fraction format) -x over 4 (fraction format) = 15. I know that I need a LCD but when I tried 2 it didn't seem to work right. the only hint my math teache gave was the answer has to be a mixed number. Can anyone help?

asked by Crystal on February 22, 2010
26. ## Physics

Mike pulls a 4.5 kg sled across level snow with a force of 250 N along a rope that is 35.0° above the horizontal. If the sled moves a distance of 63.8 m, how much work does Mike do?

asked by Mac on January 23, 2012
27. ## Physics

When work is done to increase the potential energy of an object without increasing its kinetic energy, is the net force acting on the object greater than zero?Explain.

asked by Nicole on November 14, 2010
28. ## Physics

"Water flows over a section of Niagara Falls at the rate of 1.2*10^6 kg/s and falls 50.0m. How much power is generated by the falling water?" It's a the kg/s that is confusing me. I don't know how to work with it.

asked by Stuck on July 25, 2010
29. ## Physics

Melvin pulls a sled across level snow with a force of 345 N along a rope that is 31◦ above the horizontal. If the sled moved a distance of 34.5 m, how much work did Melvin do?

asked by Spooby on February 23, 2016
30. ## physics

Diego pulls a 4.5 kg sled across level snow with a force, F, of 230 N on a rope that is 35.0° above the horizontal. If the sled moves a distance of 63.3 m, how much work does Diego do?

asked by DESPERATE on January 4, 2011
31. ## Art

A viewer examines a work of art in a style he normally does not appreciate. This is an example of what type of action? A) Reluctant Consideration B) Creative Consideration C) Respectful Consideration ** D) Practical Consideration

asked by Lova on February 29, 2016
32. ## Math

Let a particle move along the curve y(x)=1+x^2 subject to an attractive force of magnitude F=kR direct toward the origin. Determine the work W in moving the particle along the curve from P0(0,1) to P1(1,2).

asked by Tobias on November 16, 2016
33. ## Science

A team of dogs pulled a sled across the snow a distance of 45.5 meters with a horizontal force of 200 newtons. How much work did the team of dogs do?

asked by Anonymous on May 19, 2014
34. ## math

Alyssa estimates she needs 3 hours of repair work. She chooses the company that is less expensive for the 3 hour job. How much will Alyssa spend on the roof repair?

asked by Anonymous on February 18, 2015
35. ## confederation college

1.52 kg box slides 1.24 m a long a level surface.the co-efficient of kinetic friction between book and surface is 0.140.find the work done by friction?

asked by karan on April 11, 2013
36. ## Physics

Mike pulls a 4.5 kg sled across level snow with a force of 250 N along a rope that is 35.0° above the horizontal. If the sled moves a distance of 63.8 m, how much work does Mike do?

asked by Jacqueline on January 24, 2012
37. ## Physical Science

Two people who weigh the same climb a flight of stairs. The first person climbs thestairs in 30s, while the second person climbs them in 40s. Which does more work? Which uses more power?

asked by Shevon on November 19, 2008
38. ## law

Legal Assistants typically work in a law office under the supervision of a/an: (Points: 5) attorney. freelancer. judge. legal secretary. Is it "Attorney"

asked by Tony on October 6, 2011
39. ## math

Can someone please help me with these problems?Out of 35 problems these are the ones I can not figure out.Please show all of the stepswith no shortcuts. I am sincerely trying to learn this stuff.Thanks 4y-2+y+36=7y+40-5y 5.3x-5.36=4.24-6.7x 6(x+4)=8(x-2)

asked by barb on August 6, 2010
40. ## TV show lost and philosophy

In class, we are learning about john locke and his view on free will and personal idenity. I know the john locke on the tv show Lost is like him so I was wondering if the philosopher and the tv characters are like regarding personal idenitity and free

asked by Anonymous on May 24, 2009
41. ## Science

A railroad diesel engine weighs four times as much has a freight car. if the diesel engine coasts at 5 km/h into a freight car that is initially at rest, show that the speed of the coupled cars is 4 km/h.

asked by Tb on September 13, 2018
42. ## additional maths

The area, A cm3 , of a circle increases at a constant rate of 2 cm2 ´ s -1 . If the initial area of A is 1 cm2 , show that the radius of the circle at time t is given by r=sqrt( 2t+1/ pi) sqrt on both denominator and numerator

asked by eduardo on August 30, 2015
43. ## Chemistry

Two elements, R and Q, combine to form two binary compounds. In the first compound, 9.50 g of R combines with 3.00 g of Q. In the second compound, 7.00 g of R combines with 4.50 g of Q. Show that these data are in accord with the law of multiple

asked by Jackie on September 7, 2013
44. ## Math

The area, A cm3 , of a circle increases at a constant rate of 2 cm2 ´ s -1 . If the initial area of A is 1 cm2 , show that the radius of the circle at time t is given by r=sqrt( 2t+1/ pi) sqrt on both denominator and numerator

asked by Aaqib zaman on January 28, 2015
45. ## trig

Prove sin 1 cos  1 cos sin  0 1. Show each step of your proof. 2. Provide written justification for each step of your proof. C. If you use sources, include all in-text citations and references in

asked by carolyn on July 10, 2012
46. ## AP Chemistry

iron has a density of 7.86 g/cm3 and crystallizes a body centered cubic lattice. Show that only 68% of a body centered lattice is actually occupied by atoms, and determine the atomic radius of iron

asked by Shayla on November 27, 2012
47. ## Maths

A right circular cone is circumscribed about a sphere of radius a .If h is the distance from the centre of the sphere to the vertex of the cone. Show that the volume of the cone is 1/3pi a^2(a+h)^2/(h-a). Find the angle of a cone when the volume is minimum

asked by Joel on August 9, 2016
48. ## math

A magazine claims that 25% of its readers are college students. Of a random sample of 200 readers, 42 are college students. Use a .10 level of significance to test Ho: p =.25 and H1: p ≠ .25 Show the hypothesis test procedure.

asked by cristi on September 14, 2010
49. ## Pre Calculus

please help me with this problem? I don't know how ro do it. please show me step by step. Write the slope intercept form the equations of the lines through the given point parallel to the given line and (B) perpendicular to given line. point slope ((7,-2)

asked by Joseph on September 7, 2008
50. ## Science

I need an idea to show single replacement reaction and double replacement reaction. The example the teacher used was a single guy + couple dancing - Girl swithes partners. I have to be able to draw the idea....help!!

asked by Ramona on January 19, 2009
51. ## AP Chemistry

Iron has a density of 7.86 g/cm3 and crystallines in a body-centered cubic lattice. Show that only 68% of a body-centered lattice is actually occupied by atoms, and determine the atomic radius of iron.

asked by Angie on November 14, 2009
52. ## physics

Q1) consider a stationary nucleus of mass M. show that the minimum energy the photon must have to create an electron-positron pair in the presence of stationary nucleus is 2mc^2(1+ m/M) where m is the rest mass of the electron.

asked by ...... on September 29, 2013
53. ## Physics repost

Four resistors of 10.0 each are connected in parallel. A combination of four resistors of 10.0 each is connected in series along with the parallel arrangement. What is the equivalent resistance of the circuit? A)80.0 B)40.4 C)40.0 D)42.5 This is all I

asked by Jon on April 9, 2008
54. ## Algebra

The volume of a sphere is given by: V=4/3 pie r cubed. Use the formula, and show your workings, to find out what happens to the volume of a sphere if r is halved and r is trippled? Please help as this has just completly lost me, i end up with V = 4/3 Pie r

asked by StephanieNZ on March 21, 2010
55. ## math

Simon must choose one fiction book and one biography for a reading project. he has 6 different fiction books to choose and 7 different biographies to choose. write an equation to show how many different ways he can choose one of each type of book?

asked by Jaiden on January 15, 2013
56. ## physics

consider a stationary nucleus of mass M. show that the minimum energy the photon must have to create an electron-positron pair in the presence of stationary nucleus is 2mc^2(1+ m/M) where m is the rest mass of the electron.

asked by prerana on September 29, 2013
57. ## calculus

Show that the function f(x)=4x^3−15x^2+9x+8 satisfies the three hypotheses of Rolle’s theorem on the interval [0,3]. Then find the values of c on the interval [0,3] that are guaranteed by Rolle’s theorem. Give your answer as a set of values, e.g.,

asked by esma on October 6, 2010
58. ## Physics Need Help

The pile driver struck the piling with a speed of 20 m/s. At what height did the pile driver hammer have to be lifted for it to fall freely and attain that speed before striking the piling? Show steps please!!!

asked by Kimberly on September 14, 2014
59. ## Math

I just want to make sure I'm right. Representing a portion of another portion can be thought of as finding a part of apart. For each of the parts described below figure out what part of the whole is described. for each problem show at least one picture or

asked by Jessica on February 9, 2017
60. ## math

I need help making this question into a equation? A cable television company charges \$15 plus \$5 each for extra services and now write an equation to show how much a person would pay for television if they had x number of extra services?

asked by charles on April 5, 2016
61. ## application programmin

I need to write code in Visual Basics 2012 for a grading system. I can do most of it but I don't know how to make it see missing grades. Also when they fail a grade the background turns red but when I clear the boxes it stays red this is my clear: Private

asked by Mattie on October 17, 2016
62. ## Pre-Algebra (check my answer)

5. Dave has work shirts in 5 different colors. He works three days each week. How many possible arrangements are there for the shirts each week? A. 15 B. 60 C.120* D.125

asked by on May 29, 2018
63. ## math

What is 6.5%of 40? Showing work 0.065 x   40 -------------   2.600 that is 2.6 just reverse what you would to to get a percentage. 40 times .065 = 2.6

asked by jordan and brooke on January 17, 2007
64. ## math

Gasoline is 2.79 a gallon, if you use 2 3/4 gallons a day driving to and from work, how much should you budget for 20 days? Now, would I multiply? \$2.79 x 2.75 then multiply that number by 20 days?

asked by Keirra on August 7, 2010
65. ## Math

A car wheel has a diameter of 0.4 meters. Work out how many full turns the wheel makes when the car travels a kilometer

asked by Jenny on April 10, 2013
66. ## physics

how does a ticker timer work and how can a ticker timer be used to measure the displacement and velocity of a moving object in a mechanics practical?

asked by pipa on March 10, 2009
67. ## toxicology

dichlorodiphenyltrichloroethane (DDT). What was DDT initially used for, and how does it work as a pesticide? Explain the benefits of DDT, and then discuss how DDT moves through the environment.

asked by Anonymous on November 27, 2017
68. ## Algebra

Can someone check my work please? Write using positive exponents, and simplify if possible. 1. (–3x)^–2 answer: 1/9x^2 2. Multiply. Write the answer in scientific notation.

asked by Joe on June 10, 2007
69. ## PHYSICS

Calculate the work done against external atmospheric pressure when 1 g of water changes to 1672cm3 of steam. Take the atmospheric pressure as 1.013×105Nm−2

asked by FM on November 10, 2014
70. ## English

where can i find a comparison chart for urban legends by James Henslin and how urban legends work by Tom Harris?

asked by Bryan on September 17, 2008
71. ## Physics

The coefficient of kinetic friction between a suitcase and the floor is 0.23. If the suitcase has a mass of 70.0 kg, how far can it be pushed across the level floor with 530 J of work?

asked by Anthony on February 27, 2012
72. ## physics

You want to set up a standing wave on a string that has a length of 3.7 m. You find that the lowest frequency that will work is 46 Hz. What is the speed of a wave on this string?

asked by Elizabeth on December 5, 2014
73. ## math

why dosnt the commutitive property work with subtraction and division? For subtraction : Because a - b and b - a are not the same. They are of opposite sign. For division: a/b does not equal b/a. If it did, you would have a^2 = b^2 for ANY a and b, which

asked by sierra on March 5, 2007
74. ## Environmental Science

I'm confused about how hybrid cars work...is gas used to accelerate, or is that electric power? So on highways, they just rely on electric power, right?

asked by Heather on April 13, 2011
75. ## Math

Find the distance function s(t) if you know the acceleration function a(t)= sin(0.1t)/cos^3(0.1t) find the second derivative of a(t). I will be happy to critique your work.

asked by SKuink on November 16, 2006
76. ## math

Using the formula for the area of a triangle, A = 1/2 bh, find the area of this triangle pictured. The base is 2x + 16 and the height is 4x. I just don't know how to work the problem.

asked by Alyssa on January 17, 2011
77. ## Physics

a 0.67 kg rubber ball has a speed of 2.2 m/s at point a and kinetic energy 7.1 J at point B find the total work done on the ball as it moves from a to b

asked by Brittany on February 27, 2013
78. ## math

If g(x)=(ax square root of 1-x)^2. Express g(10) in simplest form I did g(10)=(a(10) square root 1-10)^2= (a*10)^2(1-10)=1000^2(-9)= -9000^2 Is this correct? thanks for checking my work

asked by sara on March 10, 2019
79. ## science

1) Identify the systems of your body, and explain how these systems work together. 2) Describe the flow of blood to the human body, including through each of the four

asked by help!! on May 27, 2018
80. ## Physics

a 0.67 kg rubber ball has a speed of 2.2 m/s at point a and kinetic energy 7.1 J at point B find the total work done on the ball as it moves from a to b

asked by Brittany on February 27, 2013
81. ## physics

What is the work done by a crane to lift a 500kg beam over a height of 50.0m? Assume the crane lifts the beam at a constant velocity.

asked by help on October 30, 2018
82. ## physics

How much work is done to move a 6kg Christmas cake from the bottom shelf to.the refrigerator ( 0.5m high) to the top shelf (1.5m high)

asked by maria on December 26, 2011
83. ## Science

As the angle between the direction of the applied force in the direction of movement increases from zero to ninety what happens to the fraction of the force that contributes to the work?

asked by Tracey on October 6, 2011
84. ## Biology

1. How can transport be disrupted in a cell? 2. How does the cell membrane work? 3. How does the cell communicate with the outside and inside environment? 4. How does the cell use 1-3 to help maintain homeostasis?

asked by hansanie deonarine on January 19, 2010
85. ## College Physics

A monatomic ideal gas with a pressure of 1.39x10^5 Pa and has a volume change of 260 L to a volume of 39.0 L. the second pressure is 3.28x10^6. How much work is done?

asked by Kyle on December 7, 2011
86. ## physics

wally sees a ball sitting on the floor.he kicks the ball across the floor. does he do any work?if not why?if so what energy change is occurring?

asked by lisa on June 1, 2012
87. ## physics

A force of 303.0 N is used to push a 160 kg mass 30.0 m horizontally in 3.00 s. (a) Calculate the work done on the mass. 1 kJ (b) Calculate the power developed. 2 kW

asked by Anonymous on December 12, 2011
88. ## Math

A worker can complete the assembly of 12 tape players in 4 hours. At this rate, how many can the worker complete in a 40 hour work week ?

asked by Megan on December 10, 2015
89. ## statistics

A team of at least five volunteers will be selected from seven people who volunteer to work at a food bank. a) How many different teams are possible? b) How many different teams are possible if one of them will be the team coordinator?

asked by jerry on December 8, 2011
90. ## Physics

A particle of mass m is subjected to a force acting in the x-direction. Fx = (3.2 + 0.55x) N. Find the work done by the force as the particle moves from x = 0 to x = 4.5 m. 1

asked by Gina on September 21, 2010
91. ## Physics

The coefficient of kinetic friction between a suitcase and the floor is 2.14. If the suitcase has a mass of 71.5 kg, how far can it be pushed across the level floor with 570 J of work?

asked by kidincoll3ge on October 11, 2011
92. ## PHYSics PLEASE I NEED HELP

wally sees a ball sitting on the floor.he kicks the ball across the floor. does he do any work?if not why?if so what energy change is occurring?

asked by lisa on June 1, 2012
93. ## Physics

The frequency of the wave can be changed by changing the frequency at which the waves are generated. True or false My work I think the answer is false

asked by Hope on November 23, 2014
94. ## science

At the speed of 2.5 m/s, how many seconds will it take the kayak to run a 4,500 m course? What is the speed of the kayak inn kilometer per hour? I want to work it on my own, just need help with formula please thanks

asked by Annie on March 9, 2011
95. ## math

A medication is available in 30mg. tablets. A patient is given a prescription for gr. ii. How many tablets should the patient take? I am not sure how to work this problem out, and i am confused on the gr. ii. part, i do not know what it means, please help.

asked by Angel on September 4, 2012
96. ## Math

The force on an object is F =−21j . For the vector v =4i −j , find: a) The component of F parallel to v : (b) The component of F perpendicular to v : The work, W, done by force F through displacement v :

asked by Tim on May 6, 2018
97. ## maths

the temperature drops by 6 degree Celsius for each of the next three days write down the calculation to work out the total change in temperature over these three days

asked by anu on September 23, 2015
98. ## physics

A fisherman reels in 12.0 m of line while landing a fish, using a constant forward pull of 25.0 N. How much work does the tension in the line do on the fish?

asked by steve on October 21, 2009
99. ## Literacy

What are the comonents of a successful literacy program?Identify examples of successful programs and explai how they were able to make their programs work.

asked by Anonymous on April 22, 2010
100. ## physics

The coefficient of kinetic friction between a suitcase and the floor is 0.29. If the suitcase has a mass of 76 kg, how far can it be pushed across the level floor with 710 J of work?

asked by xp on October 9, 2012