# 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 477
1. ## Science

Find the work done when a 25kg weight is lifted to a vertical height of 2.0m from ground ...

asked by Hema on January 24, 2017
2. ## Editing

On this hwk help forum, do you edit people's work? I have a paragraph and I need someone to look it over and make some corrections. Would anyone be willing to do that?

asked by Gina on October 4, 2007
3. ## A.P us history

How does the American work force > change during the 1950’s, what causes this and what types > of new technology is developed?

asked by brenda on April 11, 2009
4. ## career exploration

1. Processing clerks work in: a) restaurants b) amusement parks c) airports d) warehouses please?

asked by anonn on December 6, 2018
5. ## Physics

if you push a wall with a force of 50N, the work you do is...... (a)500J (b)5000J (c)50J (d)zero

asked by Anonymous on August 18, 2010
6. ## Business communication

How do you write a positive message for a business that is going to have less work days and shorter hours?

asked by Martha on April 30, 2010
7. ## physics

wally holds a pillow over his head for an hour does he do any work ? if not y? what energey changes is accouring?

asked by lisa on June 1, 2012
8. ## math please help

In the diagram below, we have DE = 2EC and AB = DC = 20. Find the length of FG. I have no idea how to do this. I did a problem almost exactly the same and approached it the same way, it did not work.

asked by Gem on April 2, 2015
9. ## physics

how can we derive the work-energy theorem form Newton's second law of motion?

asked by sarah on March 16, 2015
10. ## english

Which of the following is CORRECT? A. It's a lot of work. B. Don't aggravate me. C. I like movies alot. D. She is smarter then he is.

asked by kimberly on April 20, 2011
11. ## Life orientation

Name and explain in detail four organizations/agencies that work to address human violations?

asked by Tumelo koloti on March 19, 2015
12. ## Employment

How old do you have to be to work at "Tim Horton's"? I cannot find a specific age minimum, so I'm assuming it's 16?

asked by Anonymous on January 9, 2009
13. ## physics

What will be the magnitude of work if a force of 25N pulls a stone through distance of 5m in its direction ?

asked by Hassan on January 14, 2012
14. ## science

what force is applied by Andre if he does 250 J of work as he pushes a box 19 M along the ground ?

asked by anna on October 19, 2014
15. ## Algebra repost for James

Algebra - James, Sunday, September 30, 2007 at 9:00am How do you work: 3-4q=10q+10

asked by Ms. Sue on September 30, 2007
16. ## Science

how much work is donhe when a force of 25 newtons is used to slide a sofa 10 meters across a room

asked by Jennifer on October 13, 2010
17. ## Physics

Air in a balloon does 50 J of work while absorbing 70 J of heat.What is its change in internal energy?

asked by Haim on June 23, 2013
18. ## Science

When did Gregor Mendel publish his results ? When did people notice how important his work was ?

asked by Anabelle on April 6, 2014
19. ## math

reiny, could you give the motorists two trips another try. it appears you can work it . i'd appriciate seeing an answer. thanks.

asked by mac on July 22, 2011
20. ## Precal

How would you work this out? This is verifying trigonometric equations. cot^3x+ cotx= cosx(csc^3x)

asked by Lexi on April 6, 2016
21. ## The mind at work

Boss Tweed encourages his associated to work " like a well- oiled machine, " thus providing his workers with

asked by IV on June 19, 2016
22. ## geography

how does floridas physical and cultural geography effect the way people live and work

asked by marisa on October 8, 2009
23. ## Psychology

In what ways do you see psychology used in the environment (work, home, school, etc.) on a daily basis?

asked by Help Please on April 25, 2008
24. ## Question

A family history of movement to obtain work in agriculture is required. What does that means?????????

asked by Lauren on December 26, 2011
25. ## Trig

How do I do this? I punch the numbers into my calculator, and they don't work. B=sin^-1 (12/7 sin42\[Degree])

asked by Jane on December 8, 2010
26. ## science

1) which scientist's work did Copernicus contradict? 2) what made it difficult for him to prove his theory?

asked by jake on January 11, 2009
27. ## University of makati

Calculate the work done to push the 5 kg cowling ball up to the ramp which is 20 degrees to the horizontal.

asked by rench anonuevo on March 9, 2016
28. ## chemistry

Calculate the expansion work done when 50 g of water is electrolysed under constant pressure at 25C

asked by Dana on September 5, 2010
29. ## math

is thier any site of math of 5 class and above because i need to do lot of hard work in maths Thanks.

asked by Rosalia on April 1, 2009
30. ## Physics

Air in a balloon does 25 J of work while absorbing 81 J of heat. What is the change in internal energy?

asked by D on November 19, 2011
31. ## Physica

How much work is done by a person lifting a 2 kg object from a bottom of a well at constant speed of 2 m\ s for 5 sec

asked by Q16 on July 15, 2012
32. ## precalculus

find two sets of parametric equations for the given rectangular equation x+y^2=4 can you check my work? x=-y^2+4 y=-t^2 x=-t^2+4 x=-t^3 y=-t^3+4

asked by Anonymous on December 13, 2016
33. ## physics-work

if 2.0 J of work is done in raising a 180 g apple, how far is it lifted? equation used to figure this problem out?

asked by lalaglaze on October 19, 2009
34. ## Physics

A force of 150N is exerted horzontally to dispalacement through adstance of 400cm.how much work done?

asked by Jarso on March 6, 2012
35. ## physics

calculate the work done in lifting a 300N weight to a height of 10 m with an acceleration 0.5m/second square.

asked by gallium on September 12, 2011
36. ## Language

Which word in the following sentence restates the word spry? My grandmother who keeps active by jogging and playing tennis is as spry as a teenager. grandmother who keeps active*** sab-o-tage n 1. any interference with production work in a factory,

asked by Hayley on August 8, 2017
37. ## Physics

Two masses ( 2.3 kg and 4.2 kg) connected by a massless rope hung over opposite ends of a frictionless pulley. Each mass is initially 1.50 m above the ground, and the top of the pulley is 6.5 m above the ground. What maximum height does the lighter object

asked by John on November 9, 2014
38. ## American Government

The federal government sets requirements that all public schools must follow, while state governments set standards listing what students need to learn. This is an example of what constitutional system? A. dual federalism B. cooperative federalism C.

asked by Jane on November 26, 2016
39. ## physics

if a piece of aluminum with mass 3.99g and a temperature of 100C are dropped into 10cm^3 of water at 21C, what will be the final temperature of the system? The specific heat of aluminium is .900J/gC... ok so i know that i set both equal to each other, but

asked by garrick on April 22, 2009
40. ## physics?

A heavy steel ball S is suspended by a string from a block of wood W, as shown in the sketch. The entire system is dropped from a height. Neglecting air resistance, the tension in the string is equal to A zero B the weight of S C the difference of the

asked by Brandon on May 20, 2012
41. ## American Gov

The highest priority for most members of congress: A)ensuring that the constitutional system of checks and balances works properly. B)supporting his or her party's legislative platform C)getting reelected D)gaining a reputation among other members of

asked by Amanda on July 13, 2011
42. ## Statistics

Calculate the number of new shelving units needed for a medical record filing system based on eight shelves per unit at 36 inches per shelf. The average record size equals 0.30 inches, and the center anticipates seeing 4,500 patients the first year.

asked by Linda on April 9, 2016
43. ## history

Under America's second party system, the Whigs stood for? A. policies that kept government hands off business and industry. B. a "negative liberal state." C. a "liberally negligent" state. [D. policies that directly supported commercial enterprises ] my

asked by jake on November 30, 2011
44. ## Business Law

Should debtors who voluntarily incurred debts such as purchase of a home theater system be able to receive the same benefits of filing bankruptcy as individuals who incurred debts involuntarily, such as emergency medical bills? Explain and support your

asked by Patte on July 11, 2016
45. ## essay

In some countries such as AUSTRALIA, citizens are required BY LAW to vote in a national election.If they are over 18-years-old they must be registerd to vote and if they fail to go to their polling place on election day, they may be subject to a fine. And

asked by lola on September 25, 2008
46. ## History

Yes or no. To have a favorable balance of trade, a country must sell fewer goods to other countries than it buys from other countries. Yes or no.Money is an example of an capital resource. Yes or no.In our economic system, people receive wages for

asked by Jacob on September 12, 2010
47. ## American History

The federal government sets requirements that all public schools must follow, while state governments set standards listing what students need to learn. This is an example of what constitutional system? A. dual federalism B. cooperative federalism C.

asked by Anon on November 27, 2016
48. ## science

Particles of mass 3m and 5m hang one at each end of a light inextensible string which passes over a pulley.the system is released from rest with the hanging parts taut and vertical.during the subsequent motion the resultant force exerted by the string on

asked by nishat on November 5, 2016
49. ## Medical billing and coding

In what model of the integrated delivery system do physicians keep their own offices but share administrative and management services with other managed care organizations? A)group practice without walls B)physical hospital organization C)management

asked by Yorhe on January 10, 2013
50. ## S.S.

9. Under America's second party system, the Whigs stood for A. policies that directly supported commercial enterprises. B. policies that kept government hands off business and industry. C. a "liberally negligent" state. D. a "negative liberal state."

asked by Sarah on October 23, 2014
51. ## English

I included my doubts using question marks. I need to rephrase "hopefuls", "disposable" and the last sentence. I really hope you can help me. 1) Craig Jones is not only an office worker, but he is also a talented singer who dreams of becoming a star. 2) He

asked by Henry2 on February 21, 2012
52. ## Finance

20. TexMex Products is considering a new salsa whose data are shown below. The equipment that would be used would be depreciated by the straight-line method over its 3-year life, would have zero salvage value, and no new working capital would be required.

asked by ABC on March 1, 2010
53. ## Math

7. Jim has 38 bottles of water in 9 of x bottles and one pack that contains only 2 bottles. What is the value of x? (Hint: Set up a two-step equation.) I don't know how to solve this. Help. 10. Addison read 25 pages of the book the first day. She continued

asked by Rose on January 10, 2018
54. ## Math

The curve y=x^3-3x^2-8x+4 has tangent L at point P (-1,8). Given that the Line M is parallel to L and is also a tangent to Q show that the shortest distance between L and M is 16 root 2 Sorry This is the correct question

asked by Jodis on May 12, 2018
55. ## College Stats

Suppose that two random variables X1 and X2 have a bivariate normal distribution, and Var(X1) = Var(X2). Show that the sum X1+X2 and the difference X1− X2 are independent.

asked by Sophia on January 24, 2017
56. ## Physics

Find an arrangement of a 50-g, a 100-g, a 200-g and a 500-g mass that balances. Show all the calculations and indicate the positions the mass should occupy.

asked by Lila on January 14, 2014
57. ## Math

A tuition bill was \$4360. If she paid \$6052 what's the percentage increase on her tuition. (Could you please show me how you get this answer so I'll have an idea on how to do the others that are similar)

asked by Meredith on July 13, 2012
58. ## physics

at what distance would repulisve force between two electrons have a magnitude of 2.00 n between two protons ? 2=kq1q2/r^2 r^2 = 9.0 x10^9 x (1.6 x 10^-19)^2 So, what is the R, on my answer from, this is 1.07 x10^-14m, however, I cannot get this, can you

asked by yan on February 21, 2013
59. ## physics

Which of the following does not show a difference between the wave theory and particle theory of light; reflection, refraction, interference, diffraction, or polarization? Thank you.

asked by abster on May 8, 2011
60. ## math

please write an equation to show total hours of team practice team practiced 2 1/2 hour 5 days this week. is it 2 1/2 x 5 = x

asked by Kyle pls help Ms. Sue on October 29, 2012
61. ## chemistry

a metal p forms 2 different chlorides x and y. if 12.7g of chloride x and 16.3g of chloride y contain 7.1g 10.7g of chlorine respectively, show that the figures agree with the law of multiple proportion

asked by c on December 27, 2017
62. ## advanced functions

Use the Pythagorean identity to show that the double angle formula for cosine can be written as a) cos2x = 1 - 2sin^2x b) cos2x = 2cos^2x - 1

asked by Anonymous on November 2, 2009
63. ## Science

You are creating a carbon cycle poster. In which direction would you draw arrows to show the movement of carbon through the process of respiration?

asked by Sarah on December 11, 2013
64. ## Matrix

If A=(aij) and B=(bij) are arbitrary square matrices of order 2, show that |AB|=|A||B|? I don't understand how to start this question. What is the question even asking?

asked by Anonymous on March 7, 2015
65. ## Math

Hasan made a model for 437 using 4 hundreds, 3 tenns, and 7 ones. What are two other ways he could show 437 using base-ten blocks?

asked by Diamond Burnette on August 10, 2011
66. ## Pure Mathematics

4) The roots of the equation z^2+2z+4=0 are denoted by α and β. a) find α and β in the form re^iθ, giving the values of r and θ b) Using de Moivre's Theorem, show that α^3=β^3. c) find the exact value of αβ*+α*β

asked by Kerry on September 23, 2013
67. ## Calculus

Can someone show how this question is solved. Consider the curve given by the equation 2y^3 + y^2 - y^5 = x^4 -2x^3 +x^2 Find all points at which the tangent line to the curve is horizontal or vertical. Thanks!

asked by Henry on July 18, 2015
68. ## Organic Chemistry

Assume 1 g of the 3 g is aspirin. Show by calculation that 7 mL of 6 M HCl is enough to completely neutralize the conjugate base of aspirin to the neutral compound.

asked by KM2017 on September 17, 2015
69. ## math

I donot understand how to do this practice question for a test I have tomorrow. can someone please show me step by step? (-> is an arrow) lim x-> 0 (32-32cosx)/64

asked by abby a. on September 23, 2009
70. ## math

what is the volume in cubic feet if you have a cylindrical object whic is 8' in diameter and is 16' feet long.? could you please show in detail how to figure this out? thank you

asked by jay on November 17, 2012
71. ## math

3x^2+6x/2x^2-11x+12 - 2x^2-5x+3/x^2+x-2 ÷ 4x^2-12x+9/x^2-4 I got 3x^3+2x^2-12x+8 / (x-1)(2x-3) (x-4) Is this right please show your steps so I can understand! Thanks I greatly appreciate your help! Iwas just wondering wen my question be answered...thanks

asked by Satrianna on January 19, 2013
72. ## math

hasan made a model for 437 using, 4 hundreds, 3 tens, and 7 ones. what are two otherways he could show 437 using base ten blocks

asked by Anonymous on September 21, 2011
73. ## physics

A rocket of mass 100,000 kg undergoes an acceleration of 2 m/s2. Show that the net force acting on it is 200,000 N.

asked by Peg on May 17, 2014
74. ## Physics

A bat flying in a cave emits a sound and receives its echo 0.1 s later. Show that its distance from the cave wall is 19m.

asked by Mickey Mouse on July 9, 2011
75. ## Problems in three dimensions

A regular tetrahedron has sides of length s. Show that the surface area, A, of the tetrahedron can be determined using the formula A= square root of 3s^2

asked by Zara on February 23, 2017
76. ## Math

A motorist travels 108km in 2hrs 15mins. if she travels at a steady speed, find how far she goes in 1 hour. PLEASE SHOW ALL WORKING

asked by Ashley-Ann on January 28, 2010
77. ## Math

Let AB be taken as unity, and let it be required to multiply BD by BC. I have only to join the points A and C, and draw DE parallel to CA; then BE is the product of BD and BC. Show that the length of BE is the product of the lengths BD and BC.

asked by Vi on March 16, 2015
78. ## Algebra 1 (Reiny or Kuai)

1. Show that ABCD is a trapezoid. (A: (-2, 5); B: (4, 5); C: (6,2); D: (2, -1)). 2. Write an equation in slope-intercept form for the line that passes through (5,0) and is perpendicular to the line given by y = -5/2x + 6.

asked by Please, help me! on December 2, 2013
79. ## Math

please show the steps so I can compare mine. Simplify the following , leaving your final answer in lowest terms. x/x+2+5-x/x-4/x^2+2x I got for my answer 3/x. Is it correct?

asked by Keonn'a on November 8, 2018
80. ## calcululs help me

if 4x^2+8xy+9y^2-8x-24y+4=0 show that when dy/dx=0, x+y=1 and d^2y/dx^2=4/(8-5y) hence find the maximum and minimum values of y plz help so far so good i got dy/dx=(4-4y-4x)/(4x+9y-12) that help me to get x+y=1 but where i could not get is the second

asked by ... on December 19, 2016
81. ## Math

Of the 6 grade students surveyed, 12% bring their lunch. SUppose 24 six graders do this, how many six graders are there. I would like you to show me how to do this, (Mom) so that I can explain to my son. Thanks.

asked by Bob on May 8, 2008
82. ## algebra

help me please im confused Consider the quadratic expression X^2 + 4x + c = 0. For what range of values does the equation have two complex roots? what am i doing here can someone show me step by step so i can at least try to do the other problems i have

asked by toni on October 8, 2013
83. ## Math

20. Write a sequence of transformations that maps quadrilateral ABCD onto quadrilateral A"B"C"D in the picture below. ( i know it doesn't show the pic of the graph but i need so much help)

asked by Need Help Anyone ! on January 31, 2017
84. ## Chemistry-help

Posted by anne on Wednesday, February 15, 2012 at 3:20pm. How to prepare 1L of 96% v/v ethanol from 99% v/v ethanol? Can you show me the calculation steps?Thanks.

asked by anne on February 15, 2012
85. ## algebra

Find the equation of a line that passes through the point (1,2)and has a slope of 1/3. Show how you found the equation. I have been sitting here for almost an hour trying to understand this!!

asked by Missa on December 16, 2009
86. ## chemistry

If 5.40 kcal of heat is added to 1.00 kg of water at 100⁰C, how much steam at 100⁰C is produced? Show all calculations leading to an answer. Please help?

asked by emily on April 6, 2016
87. ## chemistry

a metal p forms 2 different chlorides x and y. if 12.7g of chloride x and 16.3g of chloride y contain 7.1g 10.7g of chlorine respectively, show that the figures agree with the law of multiple proportion

asked by Anonymous on December 29, 2017
88. ## Math

Sarah is simplifying the rational expression 3x + 6 ----------- 3x She cancels the 3x's and states that the answer is 6. Matt tells her that she is incorrect. What is one example that he could use to show her that this is incorrect? 4 + 6 ------- ≠ 6 4

asked by Neal on December 15, 2015
89. ## MATH equations /mrs.sue

one of the worlds tallest office is 88 buildings is Malaysia the building has 88 stories . the height of the 88 stories is 1,23 use equivalent equations please show me how to do it

asked by rian on April 16, 2014
90. ## Statistics

A math department is allowed to tenure 4 of 17 eligible instructors. In how many ways can the selection for tenure be made? Please show more than one approach.

asked by tamar on November 17, 2017
91. ## history

Complete your title page for Health and the People/ Medicine. It needs to show the difference between natural and super natural cures.

asked by anonymous on September 11, 2018
92. ## chemistry

Write a net ionic equation to show that ascorbic acid, H2C6H6O6, behaves as an acid in water. Consider only its first ionization

asked by Seep on December 4, 2011
93. ## Statistics

The results of a nationwide survey show that 57.40% of college students have violated rules of alcohol use. The margin of error for the survey is 2.30%. What does this mean?

asked by Chelsea on February 27, 2015
94. ## Area of a triangle

In Triangle ABC b=6cm c=8cm and angle A=60 find the area of a triangle.let AD be the bisector of A where D lies on BC and AD=K show that AD=24root3/7

asked by Collins on October 15, 2015
95. ## math

Can you show me how to convert 39.5 feet into yards, feet, and inches or 47 tsp into gallons, quarts, cups, tbsps, and tsps

asked by Emily on October 1, 2017
96. ## Chemistry.

Caculate the wavelength of light emitted when each of the following transitions occur in the hydrogen atom. A.) n=3->n=2 B.) n=4->n=3 C.) n=2->n=1 How do you do this. Could you please just show me step by step for atleaset one. Please!

asked by Brenda on January 24, 2013
97. ## math

Show how to find the quotient 18 divided by (-6) by using the following: a) the idea of division as finding a missing factor. b) the procedures for integer division.

asked by m on October 19, 2010
98. ## Algebra 1 (Reiny or Kuai)

1. Show that ABCD is a trapezoid. (A: (-2, 5); B: (4, 5); C: (6,2); D: (2, -1)). 2. Write an equation in slope-intercept form for the line that passes through (5,0) and is perpendicular to the line given by y = -5/2x + 6.

asked by Anonymous on December 2, 2013
99. ## MATH

HASAN MADE A MODEL FOR 437 HUNDREDS, 3 TENS,AND 7.WHAT ARE TWO OTHER WAYS HE COULD SHOW 437 USING BASE-TEN BLOCKS?

asked by CHARLES on September 15, 2011
100. ## chemistry

how to draw atomic structure for elements from scandium to zinc ?and what is their valency number.plz show me the shell structure.

asked by J.Nandhini on September 22, 2012