# 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 575
1. ## physics

Consider air to be a mixture of 80% nitrogen and 20% oxygen. How much work is required to raise the temperature of 7 mol of air by 9 ∘C in an adiabatic process?

asked by lizbeth on April 9, 2016
2. ## physics

Georgie was pulling her brother (of mass 25 kg) in a 10.4 kg sled with a constant force of 24 N for one block (72 m). How much work did Georgie do? Answer in units of J.

asked by ghjf on February 25, 2011
3. ## Calc

can someone help me get the first and second derviative for X square root 4-X^2. For the first derviative I did this by using the equation F(x)g'(x)+g(x)f'(x). After using this my final answer is looking something like -X^2/(4-x^2)^1/2+ (4-x^2)^1/2 I am

asked by Amber on July 5, 2017
4. ## Physics

A crate weighing 800 N is pulled 5.0 m across a floor at constant velocity. The coefficient of friction between the surfaces is 0.30. How much work (in J) is done on the crate ?

asked by JAmes on January 16, 2008
5. ## physics

A spring with spring constant of 30 N/m is stretched 0.19 m from its equilibrium position. How much work must be done to stretch it an additional 0.077 m? Answer in units of J

asked by Kaylee on June 24, 2014
6. ## physics

A student in a lab exerts a 14 N force to pull a block a distance of 63 cm. If a total of 8 J of work is done, the angle between the force and the displacement is none of the above 89° 25° 61° 65°

asked by p on July 16, 2011
7. ## english

How do I cite an in- text citation in mla format that has more than 3 authors do I list all the authors and how will this ciation appear in my work cited page

asked by kate on October 12, 2011
8. ## math

Determine which tow equations represent perpendicular line. (a) y= 3/8 x -4 (b) y= 4x - 3/8 (c) y= - 1/4 x + 3/8 (d) y= 1/4 x - 3/8 b and c. Perpendicular lines have slopes which are negative reciprocals of each other. So 4 and -1/4 work.

asked by Dee on May 26, 2007
9. ## COM/156

I have a rough draft of an essay that I need revised and checked for comma usage. Would someone be able to look my essay over? To be honest I do not have another person to read over my work.

asked by blake on August 20, 2011
10. ## science

i have a work sheet to do it gives me the atomic number and the mass number of elements i have to fill in the missing electrons protons neutrons

asked by austin on October 4, 2012
11. ## math

if i put this data set 24, 24, 26, 29, 29, 31, 32, 32, 32, 180, 182, 210, 214, 216, 300 in a graph which graph would work best?

asked by OMG I HAVE NO CLUE on May 24, 2019
12. ## PHYSICS

A net force of 47.0 N acts on a 53.0 kg body initially at rest. Compute the work (in joules) done by the force in the first second of time. Not sure where to start at all :(

asked by Beckles on April 5, 2015
13. ## Social Studies

Did Judaism or Christianity religion include the New Testament? Both work as well. I think it's that only Christianiy followed the New Testament, and the Old was resigned as the Hebrew Bible for Jews.

asked by Anonymous on October 15, 2018
14. ## Math

How would you work this... You are facing north. You turn 270 degrees counterclockwise. Which direction are you facing? Is it West? You start out at 90 and go from there? I don't know...

asked by Kevin on February 10, 2010
15. ## math

what is the slope of the line represented by the equation 4x+3y=12 1) 4/3 2) 3/4 3) -3/4 4)-4/3 I did 4x+3y=12 -4x -4x 3y=-4x+12 /3 /3 divide each side by3 y=-4/3x+4 so I got answer 4 because the -4/3 is the slope Is this correct? Thanks for checking my

asked by b8 on May 25, 2014
16. ## physics

At what projection angle will the range of a projectile equal to 6 times its maximum height? Just need answer, i have done all of the work and want to check my answer

asked by carol on December 2, 2009
17. ## physics

two positive points charges of 15c and 13c are placed 12cm apart . find the work done in bringing the two charges 4cm closer.

A car does 6.0 104 J of work in traveling 2.6 km at constant speed. What was the average retarding force (from all sources) acting on the car?

asked by Luricela on February 13, 2010
19. ## Physics

A 2.5m long string vibrates as a 100 Hz standing wave with nodes at 1m and 1.5m from one end of the string and no points in between the two.Which harmonic is this?work out

asked by Anonymous on November 10, 2016
20. ## Math

what is 3/4 7/8 5/6 2/5 and for each fraction above state weather its a reapaeting fraction of terminating decimal and how do u know the ?' is correct 3/4 7/8 5/6 2/5 SOHOW ALL WORK PLEZZ HELP ME WITH ALL OF THIS I BEG YOU!

asked by NaNa on September 17, 2009
21. ## English Lit

Write a poetry explication that describes aspects that typify the work of a poet in Twentieth-century to contemporary poetry

asked by Anonymous on February 8, 2010
22. ## management

Manager joe presents problems to his work group and gets suggestions before making a decision . Joe's management style is

asked by ? on March 21, 2013
23. ## physics

A 120 kg crate on a flatbed truck is moving at 1.5 m/s2 for 65 m. What is the total work done on the crate if it's sitting horizontally at an angle of 0 degrees?

asked by Alexius on November 11, 2010
24. ## AP European History

What were the fundamental ideas associated with mercantile theory? Did they work? Which European country was most successful in establishing a mercantile empire? Least succesful? Why?

asked by Anonymous on November 17, 2014
25. ## Physics

The work function for a particular metal is 2.18 eV. What is the kinetic energy in eV of photoelectrons ejected when 410 nm violet light falls on this metal?

asked by Hannah on November 1, 2016
26. ## Analytical Chemistry

How many milliliters of 0.0560 M EDTA are required to react with 50.0 mL of 0.0170 M Cu^2+? With 50 mL of 0.0170 M Sc^3+? My work so far: (50mL)(0.0170mmol/mL)= 0.85 mmol Cu^2+ I'm not sure how to do the rest. Please help.

asked by Sam on March 4, 2013
27. ## Physical Science

A 5.0kg textbook is raised a distance of 30.0cm as a student prepares to leave for school. How much work did the student do on the book?

asked by Misty T on January 29, 2009
28. ## math

Write one half and two thirds with denominators of 6. Then add the renamed fractions. Write the answer as a mixed number. WORK

asked by WEGymnast on October 21, 2015
29. ## Math

Find the domain and range of the function: g(x)=-2[2x]+1 What do those brackets mean? I'm pretty sure it's not a typo or anything because other functions on my work have regular parentheses instead of brackets. Thank you!

asked by Anonymous on August 14, 2009
30. ## math

For the following geometric sequence find the recursive formula and the 5th term in the sequence. In your final answer, include all of your work. {-4, 12, -36, ...}

asked by S.A on October 2, 2017
31. ## Physics

A 60 kg person utilizes energy at 0.25 horsepower while running up the stairs of a building. Each step is 20 cm highly. How much work does the person do in one minute?

asked by Emma on October 4, 2017
32. ## chemistry

Which of these best describes energy? A. the emission of particles from unstable nuclei B. the capacity to do work C. the splitting of a nucleus D. the combining of nuclei

asked by junior on September 14, 2010
33. ## physics

An engine pulls a train 1km over a level track.Calculate the work done by a train given that frictional resistance is 5*100000N

asked by Anonymous on October 30, 2011
34. ## Math

So I don't know how to do the work for the worksheet why didn't the circus manager want their human cannon ball to quit? I know the answer but I don't know how to get it.

35. ## physics

The efficiency of a machine is 80%. Determine the work done by a person using this machine to raise a load of 200kg through a vertical distance of 3.0 (take g = 10m/s)

asked by Anonymous on March 9, 2017
36. ## Science

A girl lifts her 30-kg (294 N) knapsack a vertical distance of 0.50 m and then she carries it 10 m across the park to the water fountain. How much work is done by the girl? Please help me.

asked by Hanny on May 2, 2016
37. ## Calculus

Am I allowed to multiply an entire integral (on the inside AND the outside) by negative 1? I have a potential trig identity in the integral that will only work if it's multiplied by -1...

asked by Hannah on February 13, 2009
38. ## Math

For the following geometric sequence find the recursive formula and the 5th term in the sequence. In your final answer, include all of your work. {-4, 12, -36, ...}

asked by Sara on September 29, 2017
39. ## General Question

On a home work assignment it gives the page number and the problems to do followed by E3P. Does that mean every 3rd problem.(It shows 1-26 E3P, but I thought it would be 1,3,6,9,12,15,18,21,24,27) Please help. Thanks

asked by Mike on August 28, 2009
40. ## physics

a magnetic crane left a mass 1500 through a vertical height of 40m.calculate the work done in operating the crane

asked by sasi on November 1, 2011
41. ## physics

A 63.8 kg woman lifts herself 36.6 cm each time she does a chin-up. What force does she exert in lifting herself to the chin position? And, how much positive work does she do in pulling herself up once?

asked by confused on October 16, 2014
42. ## Calculus I

A spherical balloon is inflated at a rate of 10 cm^3/min. How fast does the radius change when the radius is 20 cm? Need help with set up and work through of problem.

asked by Mike on March 2, 2015
43. ## Physics

A box is pushed across a floor with a force of 2.8 N at an angle of 26.8 degrees above the horizontal. How much work, in Joules, must be done to move the box a distance of 8.3 m?

asked by Amolica on April 21, 2016
44. ## Algebra

For the following geometric sequence find the recursive formula and the 5th term in the sequence. In your final answer, include all of your work. {-4, 12, -36, ...}

asked by Britney on October 23, 2017
45. ## Physics

Work it out. How many joules of heat is given out when pieces of iron of mass 50g and specific heat capacity =460kgk cools from 80¡èc to 20¡èc?

asked by Peter on January 27, 2013
46. ## sociology

Which of three theoretical perspectives best explains the fact that Americans find work roles psychologically satisfying but also find them to be stressful?

asked by paula on July 28, 2009
47. ## physics

A machine with v.r requires 1000J of work to raise a load of 500N through a vertical distance of 1.7m . find the efficiency and m.a of the machine.

asked by Azeez on February 17, 2016
48. ## math

Paul takes longer to paint the door than pete does.When they work together it takes them 2 hours.How long would each take to do the job alone? thanks for your time and help.

asked by Anonymousab on June 12, 2013
49. ## Communication Theory

asked by Tammie on June 28, 2009
50. ## algebra

While walking along the beach John gives off 120 kj of heat andn his internal energy decreases by 260 kj. How much work is done while walking?

asked by Veronica on January 12, 2011
51. ## Physics

A boy sits on a ferris wheel. how much work is done on him by gravitional forces when the wheel makes one complete turn? Explain.

asked by Anonymous on November 14, 2010
52. ## Chemistry

Ok I think I'm gettingvit I hope, I need to check my work. Given 0.0449 mols Pt Find mass 0.0449 mol Pt x 195.08/1 =8.76g Pt Am I right

asked by Monique on September 25, 2011
53. ## Science

Hello :) For my assessment tomorrow, one of the things I have to think about is this: "Explained how the ear defenders will work using the Big Idea of Energy Transfer." I have no idea about this at all, please help!

asked by meh on May 11, 2014
54. ## Calculus

What is the average value of f(x) on [0,4] if the area between the graph of f (x) and the x-axis is equal to 12? I used the average value formula and got 12. But the answer key says 3. My work: M= 1/4 [12x] interval: [0,4] 48/4=12

asked by Tiffany on October 25, 2015
55. ## Physics

The work function of a material is 3.5 eV. If the material is the illuminated with monochromatic light (l = 300 nm), what are: a) the stopping potential b) the cutoff frequency

asked by Matt on February 16, 2014
56. ## AP Calc

Find the point on the curve y^2=4x closest to the point (8,0). My Work: Using the Distance formula- my answer i got was (7.821,5.593) but idk if i did it right...

asked by Luke on November 22, 2014
57. ## AP Calc

Find the point on the curve y^2=4x closest to the point (8,0). My Work: Using the Distance formula- my answer i got was (7.821,5.593) but idk if i did it right...

asked by Luke on November 22, 2014
58. ## Physics

I need help with this exercise, any ideas how do impedances and resitance work in a smith chart? imgur(dot)com/sZAvj6y(dot)png

asked by Josh Garder on April 16, 2018
59. ## Physics

A boy on a bucycle drags a wagon full of newspapers at 0.80m/s for 30 minutes using a force of 40N. How much work has the boy done?

asked by kelly on April 8, 2011
60. ## career

kers. They like accomplishing their work step-by-step and are good record keepers. a. conventional* b. enterprising c. social d. realistic

asked by anon on March 6, 2015
61. ## Physics

A crate is pulled by a rope making 30 degrees with the horizontal. If the work done to move it in 15 m is 2000 J, find the tension in the rope.

asked by HiHello on October 20, 2014
62. ## Maths

The volume of a hemisphere is 250 ----- pi 3 Work out the total surface area of the solid hemisphere. Give your answer as a multiple of pi. Thank you.

asked by Joanne on January 3, 2017
63. ## Algebra

For the following geometric sequence find the recursive formula and the 5th term in the sequence. In your final answer, include all of your work. {-4, 12, -36, ...}

asked by Britney on October 25, 2017
64. ## Physics

A hummingbird has a mass of about 1.7 g. Suppose a hummingbird does 0.15 J of work against gravity, so that it ascends straight up with a net acceleration of 1.2 m/s (squared). How far up does it move?

asked by Autumn on January 23, 2012
65. ## AP Physics

A car does 8.0 ✕ 104 J of work in traveling 2.7 km at constant speed. What was the average retarding force (from all sources) acting on the car?

asked by - on November 11, 2015
66. ## physics

A machine with v.r requires 1000J of work to raise a load of 500N through a vertical distance of 1.7m . find the efficiency and m.a of the machine.

asked by Azeez on February 19, 2016
67. ## physics

A machine with v.r requires 1000J of work to raise a load of 500N through a vertical distance of 1.7m . find the efficiency and m.a of the machine.

asked by Azeez on February 19, 2016
68. ## or

Consider an organization where you now work (or where you have worked). What model (paradigm) of organizational behavior does (did) your supervisor follow? Is (was) it the same as top management‟s model.

asked by arathi on June 12, 2014
69. ## Project management

work breakdown structure deliverables are ignored and replaced with activities or tasks that have been grouped in phases True or false? ****(False)

asked by Patti on April 6, 2014
70. ## math

My math teacher gave me this problem: Prove the validity of cross products by example/words. (Why does it work as a strategy?) What is validity???

asked by Anya on November 16, 2009
71. ## computer science

Please design the ¡§Classes¡¨ that will work together for the implementation of the User Case ¡§Validate User¡¨ in the ATM machine. its just want us o write a diagram..

asked by travis on June 7, 2010
72. ## physics

A spring with spring constant of 27 N/m is stretched 0.2 m from its equilibrium position. How much work must be done to stretch it an additional 0.065 m? Answer in units of J

asked by Kudo on December 29, 2011
73. ## science

how does an electric ciircuit work? Books have been written about electrical circuits, what kinds, specilized circuits, etc. You need to be a little more specific with your question.

asked by garret on April 23, 2007
74. ## BIo

How do segregation of alleles and independent assortment work to produce genetic variation? Why is variation important for the process of evolution?

asked by Anonymous on December 9, 2008
75. ## Math

A house loses 18% of its value. Its new value is £129 000. Work out the earlier value of the house. Give your answer to a suitable degree of accuracy.

asked by HS on October 23, 2013
76. ## maths

a crate is hauled 8m up a ramp under a constant force of 200N applied at angle of 25 degree the ramp. Find work done?

asked by yigerem demise on December 17, 2013
77. ## Chemistry

When preparing home-made ice cream, salt is added to the ice-water mixture. What is its function and why does it work?

asked by teetee on March 8, 2012
78. ## physics

A 14.8 kg box is being dragged 12.5 m across the floor using a rope held at a 32 degree angle from the floor. the force being used is 146 N. Determine the work that has been done.

asked by April on December 7, 2012
79. ## physics

last one before I got to go to work Which of these cities has the smallest incidence of cosmic rays? A) All about the same.B) New York City.C) Mexico City.D) Singapore.E) Anchorage.

asked by Christy on April 16, 2012
80. ## math

find the equation of the inverse of f(x)= 2^x-7 + 5 I did x=2^y-7+ 5 -5 -5 x-5=(2^y)(2^-7) 128*x-5=2^y answer y=log of 2 (128(x-5)) I switched x and y and solved for y Is this correct? Thanks for checking my work.

asked by sara on March 3, 2019
81. ## PHYSICS

How much work is done by the Moon's gravitational field as a 1005 kg meteor comes in from outer space and impacts on the Moon's surface? PLEASEEEEEEEEEE

asked by Rachel on March 10, 2011
82. ## global

Why would so many women miners prefer to work in the mines without clothing? Why did the women need the heavy belts around their waists and chains between their legs?

asked by danny on February 24, 2010
83. ## Math-Algebra 1

I need help with a pizzaz work sheet ASAP if i don't get this done i am on the verge of failing math and repeating 9th grade. its Pizzaz 11.10 thanks

asked by Brandon S. on June 12, 2011
84. ## Garde 12 Calc

Determine the work done by force f=[1,4] in newtons for an object moving along the vector d =[6,3] Okay i found the vector equation and then the parametric and now i have no clue what do please help :)

asked by Louis on June 18, 2012
85. ## Math dimensional anaylsis

To make a banner for a football game: 9 yard banner can be made in 3 hours. What is the rate of work in feet per minute?

asked by Paige on August 18, 2015
86. ## math

stamps are sold in booklets of 100, 50, 10 find as many different ways to buy 200 stamps as you can record your work I the chart

asked by yamini on October 14, 2015
87. ## physics

Suppose that 1100 j of work is done by the force 30 n in moving the suitcase a distance of 50 m. At what angle is the force oriented with respect to the ground?

asked by Justin on October 8, 2014
88. ## physics

The temperature of 2.7 moles of an ideal gas is 471 K. How much work does the gas do in expanding isothermally to 3.7 times its initial volume?

asked by Sami on December 7, 2011
89. ## statistics

Are Chicken based dishes more populat than Pizza to a level which is statistically significant at the 95% confidence level? What figures do i have to look at to work it out? Thanks

asked by Lauren on March 25, 2013
90. ## math

a pulley is used to lift a mass with a force of 900N to a height of 10 metres in 2 minutes.find the work done by the force and also the power

asked by krishna on February 5, 2015
91. ## Chemistry

Antifreeze (commonly ethylene glycol or propylene glycol) is usually mixed with water in the radiator of a car. What is its function and how does it work?

asked by teetee on March 8, 2012
92. ## physics

A constant force of 46.3 N, directed at 28.7 degrees from horizontal, pulls a mass of 14.7 kg horizontally a distance of 3.09 m. Calculate the work done by the force.

asked by Anonymous on March 8, 2013
93. ## Math

In a subdivison, 67% of homes have detached garages, 32% have a patio, and 13% have both. What is the probability that a house has a pation if you know that it has a detached garage? Please explain how you did the work, thanks.

asked by Rena on December 7, 2010
94. ## sci

Find the change in the force of gravity between two planets when the masses of both planets are doubled, but the distance between them remains the same. Please include your work!

asked by Anonymous on February 20, 2013
95. ## math

Julianne earned \$296 working at a grocery store last week. She earns \$8 per hour. How many hours does did julianne work?

asked by monica on December 10, 2014
96. ## Physics

Zinc has a work function of 4.30 ev . A 4.50eV photon strikes the surface and an electron is emitted. What is the maximum possible speed of the electron?

asked by paige on November 28, 2011
97. ## Math 3

graphing log functions for y=log12^x I don't have a calculator for this and I would like to know how to work this problem on paper so I can graph it to my chart. Can someone please help me with this problem?

asked by Brandon on October 20, 2010
98. ## math

what is the stopping distance for a work truck weighing 4,685 lbs plus cargo of 1000 lbs traveling at 35mph?

asked by Brian on June 19, 2012
99. ## science project

I have a magnet on top of my hand and a steel screw underneath my hand and there is attraction. If I give it to an adult it doesn't work. Why?

asked by shannan on January 24, 2010
100. ## Math

Brandon was paid \$132.50 commission for his work selling \$2650 of farm equipment. What was his commission rate? please explain clearly!!

asked by smile0003 on October 25, 2013