# 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 564
1. ## Trig

A silo is 40 feet high and 16 feet across. find the angle of depression from the top edge to floor. How do you solve this?

asked by Jen on April 28, 2011
2. ## Pre-Calculus

I am supposed to solve these conics, can you please help :)I am supposed to name the center and the vertices. 1. 3y^2-2x^2+12x+24+24y=0 2.-16x^2-4y^2=48x-20y+57

asked by Tori on December 3, 2012
3. ## MATH

Find the formulas for the functions f(g(x)) and g(f(x))when f(x) = 2/x and g(x) = 2x^2-1 f(g(x)) = ? g(f(x)) = ? for f(g(x)) would it be 2/x(2x^2-1) or g(f(x)) 2x^2(2/x)-1? Would i solve like this? also when I tried to input the answer after solving didn't

asked by Randy on November 21, 2014
4. ## "EASY" Algebra

Im not sure how to do this. (5q^3)(-12q^-4n^4) So far what i did was multiply 5 by -12 to get -60. Then q^3 by q^-4 to get q^-1. I don't know what to do after this. Maybe you could tell me what I should do and then I can solve it. I was taught exponent

asked by Sammy on February 5, 2007
5. ## algebra

Solve the question for both the exact irrational root and its rational approximation to the nearest tenth. sqrt 2 over 3 s + 1 = sqrt 23 q=

asked by april on May 29, 2010
6. ## Math

If you solve this you are officially amazing! "The diagonals of a trapezoid are perpendicular and have lengths 8 and 10. Find the length of the median of the trapezoid."

asked by Sheenybeany on May 19, 2014
7. ## math

the sum of three consecutive numbers is eighteen. Write an expression describing the equation and solve the state of the three numbers

asked by Erica on July 20, 2016
8. ## Trig

A silo is 40 feet high and 16 feet across. find the angle of depression from the top edge to floor. How do you solve this?

asked by Jen on April 28, 2011
9. ## math

the sum of three consecutive numbers is eighteen. Write an expression describing the equation and solve the state of the three numbers

asked by Erica on July 20, 2016
10. ## math

how do i solve, marge has six coins that total \$1.15. she cannot make change for \$1.00, 1/2 dollar, a quarter, a dime, or a nickel.what coins does she have?

asked by gary on January 21, 2011
11. ## PHYSICS

An electron in a TV is accelerated toward the screen across a potential difference of 52.8 kV. How much kinetic energy does the electron gain while accelerating? How would you solve this?

asked by Carlos gen on February 18, 2014
12. ## Math

What do you get when you solve this equation where t = time in hours log t = (0.576 log (72/526) -0.176 Would it matter if t were in minutes? Thank you

asked by Deborah on January 1, 2011
13. ## Math

Solve csc^2 x = 5 algebraically over the interval 0

asked by Anonymous on October 18, 2015
14. ## Economics HELP!!

Design an organization to solve the world banking/world bank regulation/would money supply problem

asked by Josh on November 25, 2013
15. ## math

how would you solve these problem using distributive property question #1 5(45+5)=5(_____) question#2 9(42)-9(4)=9(30)+9(______) I need this before Sunday December 6,2009

asked by Anonymous on December 4, 2009
16. ## algebra

log9 1= _______ (fill in the blank) Let x=log2 1/32 . Write the exponential form of the equation and solve the equation for x.

asked by math help on December 5, 2010
17. ## Solving Inequalities?

Ive been having problems with this soo... My first problem is this: Solve 2x-4(x+2)-6 < 0 Can someone help me step-by-step figure this out so i can at least finish the ones that are similiar to this one? Thankies

asked by Chrissy on September 3, 2009
18. ## Chemistry Help!

The reaction is O3 + NO arrow O2 + NO2 If 0.740 g O3 reacts w/ 0.670g of NO, how many grams of NO2 will be produced? I've tried to solve this. but I can't seem to get the right answer

asked by Amy~ on August 26, 2010
19. ## Algebra

Please check and see if my answer are correct 1). 24v^2w^5x^8-20v^7w^9= -4v^2w^5(5v^5w^4-6x^8) 2). 81-25z^2= (5z+9)(9-5z) 3). 5y^3-7y^2-15y+21=(y^2-3)(5y-7) 4). x^2+4x-12= (x+6)(x-2) 5). 3x^2-26x+16= (x-8)(3x-2) 6).4v^6+6v^5-18v^4= 2v^4(2v-3)(v+3) 7).

asked by Mari on August 11, 2014
20. ## Math

Write and solve an equation for each of the following. Triangle ABC is congruent to triangle DEF. AB = 2x - 10, and DE = x + 20. Find the value of x and AB. I don't even know where to begin, please help.

asked by Karlee on October 30, 2017
21. ## Math 6 proportion

21% reptiles, 11% are birds. There are a total of 1,500 animals in the zoo. Is this the correct proportion that I wrote to solve? 11/21 = r/1,500

asked by moby on May 21, 2014
22. ## Calulus

Solve the triangle.Round lenghts to the nearest tenth and angle measurements to the nearest degree. B = 43 C = 107 B = 14

asked by kelly on November 19, 2007
23. ## math

a bus charges 1.00 for each piece of luggage. if you ridethe bus at 8.50 and you have 3 suitcases, what is the total cost? solve using computations

asked by rigo on July 31, 2012
24. ## linear algebra

If possible, solve the following linear systems by Cramer's rule. 2x1 + 4x2 + 6x3 = 14 x1 + 2x3 = 0 2x1 + 3x2 − x3 = 30

asked by hannah on February 9, 2015
25. ## Algebra

I've been struggling with algebra since I started and don't understand hardly any of it and I have this problem 9xy (2/3x)^3=( a0/ ' ^a0/)x^4y I really need help I have several problems like this and don't know what to do someone please explain how I solve

asked by I don't understand on December 19, 2018
26. ## algebra

Solve the logarithmic equation. Round to the nearest ten-thousandth if necessary. log 8x^3=4 can someone walk me through this step by step?

asked by helana on October 26, 2018
27. ## pre-algebra

Solve the inequality- j-7

asked by jill on March 7, 2007
28. ## 8th grade algebra

need ideas of personal experiences to create a mathematical story problem using 4 pictures of this experience and solve the problem.

asked by Raylen on May 5, 2010
29. ## Calculus

Calculate the Riemann sum of the area under the curve of f(x)=9-x^2 between x=-2 and x=3 The answer I come up with is 10/3, but when I solve using integrals, the answer I get is 100/3. Am I doing something wrong?

asked by Mike on December 3, 2017
30. ## Math urgent! :( plz help

3. Which of the following equations has an infinite number of solutions? 3x - 3 + -4x 2y+ 4 -y = 16 7x + 5 = 4x + 5 + 3x 6y -2 =2 (y-1) Write the inequality and solve for the following problem: The result of 6 subtracted from a number n is at least 2 n -

asked by Princess Anna on January 8, 2014
31. ## Algebra

I am confused by this problem. Solve: Clear fractions or decimal first. 7/3x-1/3x=3x+24/3-1/3+7/3x. I know that I need to gather all terms first. My answer that I came up with was: -23/17. I'm sure that answer is wrong. Can someone please help? Thanks.

asked by B.B. on February 22, 2010
32. ## Pre-Calculus

To solve an equation by finding x-intercepts, Cynthia graphed the function y=x^3-5x+|2x-3|. Give several possibilities for the original equation. Thanks

asked by Anonymous on September 5, 2009
33. ## 8th grade algebra

need ideas of personal experiences to create a mathematical story problem using 4 pictures of this experience and solve the problem.

asked by Raylen on May 5, 2010
34. ## Pre-Calc

To solve an equation by finding x-intercepts, Cynthia graphed the function y=x^3-5x+|2x-3|. Give several possibilities for the original equation.

asked by Anonymous on September 5, 2009
35. ## math

Write a real-world problem that you could represent with the equation 4x+5=37. Solve the equation to find the answer to your question.

asked by gabe on January 27, 2016
36. ## lines

The line through (2,-3) and parallel to 2x+5y=3. The line through (2,-3) and perpendicular to 2x+5y=3. I just can't remember how to solve either of these kinds of problems and i can't find my notes on the subject.

asked by Amanda on July 15, 2008
37. ## Precalculus

Solve for x given the interval of [0,2pi). cos^2x=2+2sinx I got (3pi)/2 or 270 degrees.. By the way, does the notation [0,2pi) mean 0

asked by Anonymous on May 4, 2014
38. ## Pre-Cal Help Please!!

Use logarithms to solve the given equation. (Round the answer to four decimal places.) 6(1.02^3x + 1) = 11 How do i find the answer after 1.03^3x +1 = (11/6) Do i put a log on 1.03 or do I do something else Thank you.

asked by Ann on February 28, 2012
39. ## Pre-Calculus

To solve an equation by finding x-intercepts, Cynthia graphed the function y=x^3-5x+|2x-3|. Give several possibilities for the original equation. Thanks

asked by Anonymous on September 5, 2009
40. ## English

I forgot to add these sentences. Thank you very much. 1) The rise in population caused an increase in the demand for clothes. As more energy was needed to drive machinery, the steam engine (power?) was introduced (developed?). 2) The introduction of the

asked by Henry2 on July 4, 2011
41. ## english

What does frivolity mean in this sentence After a year of serious work, Mr. David's grade 8 class enjoyed the frivolity of a party.

asked by sarah on September 13, 2015
42. ## language arts

I cant find the ourspace website, I need for this evenings home work I have search several search engines...Any suggestions please

asked by Piper on August 31, 2011
43. ## PHYSICS

A CHILD CONSUMED .23 KG OF JUICE WITH 115 cALORIES PER 1.15 SERVING. HOW MUCH WORK MUST PERFORMED TO REMOVE THESE cALORIES?

asked by HANNAH on February 27, 2016
44. ## Science

A boy on a bicycle drags a wagon full of newspapers at 2m using 80N force. How much work has the boy done?

asked by Anonymous on July 15, 2019
45. ## physical science

push a box across a table with a force of 5 newtons and the box moves 0.5 meter. how much work has been accomplished?

asked by alex on January 9, 2013
46. ## Physics

A heat engine does 650 J of work and dumps 1270 J of heat to its cold reservoir. What is its efficiency?

asked by Seth on April 16, 2013
47. ## physics

A weightlifter is trying to carry a 10 kg weight held over his head across the room. How much energy will be required to do this work on the 10 kg weight?

asked by Anonymous on May 7, 2012
48. ## Physical Science

A heat engine exhauts 122.0 kal after taking 499.0 how much mechanical work was done by the engine?

asked by Barbara on September 15, 2014
49. ## Physics

True or false Wavelength is the distance between two adjacent points on a wave that are in phase My work I think it is false

asked by Dove on November 23, 2014
50. ## PHYSICS

a student consumed a 0.23 kg of juice with 115 calories per 1.15 serving. How much work you must perform to remove these calories?

asked by HANNAH on March 1, 2016
51. ## maths

The diagram shows part of a regular polygon. work out how many sides the polygon has. (it is 156 degrees).

asked by corinna on October 29, 2007
52. ## Physics

A jack exerts a vertical force of 4.5 x 10^ 3 newtons to raise a car 0.25 meter. How much work is done by the jack?

asked by Priscilla on January 7, 2010
53. ## Math

Gasoline is about \$2 per gallon. You use about 1 1/2 gallons each day driving to and from work. How much should you budget for gasoline over the next month (about 20 workdays)?

asked by Jodi on August 3, 2008
54. ## physics

Two positive point charges of 15 into 10^-10 C and 13 into 10^-10 C are placed 12cm apart.Find the work done in bringing the two charges 4cm closer ?

asked by anonymous on August 29, 2014
55. ## English

When you hear the words "volunteer work," what comes to your mind? (In this sentence why were quotation marks used? And what other expressions can we use instead of "What comes to your mind?)

asked by rfvv on November 22, 2009
56. ## physics

A horizontal force of 25 newtons pushes a box a distance of 30 meters across the floor. How much work is done by the force?

asked by stephanie on November 23, 2010
57. ## health

What are the four basic food safety principles that work together to reduce the risk of food borne illnesses?

asked by Anonymous on May 15, 2012
58. ## stem

a person weighing 65kg walks up steps that are 20cm high how much work does the person do going up each step

asked by tynesha on April 7, 2017
59. ## opinion

Write a paragraph on "Getting academic help" in college/. Once you have written your paragraph, using some of the information you have already been given, someone here will be happy to critique your work. =)

asked by deek on December 3, 2006
60. ## Algebra

Solving quadriatic equaitons using factoring. X^2-6=30-3x^2 The answer in the book is -3,3. I have tried to work the problem several times. I am not getting this answer.

asked by G on May 20, 2008
61. ## science

a box of cleaning supplies weighs 15 N. if the box is lifted a distance of 0.60 m, how much work i sdone? A)0.040 J B)9 J C)14 J D)25 J

asked by little kakashi hatake on February 2, 2017
62. ## Math

If an individual wants a work of 1300 kg m/min with a cycling speed of 300 m/min, how much resistance is needed?

asked by Natasha on October 6, 2013
63. ## Math 222

How do I write this problem as a single fraction? Sorry my addition button doesn't work. 2x plus 7y 2x plus 5y ____________ - ____________ plus 2 8x 2x

asked by Tika on April 24, 2015
64. ## physics 11

brutus, a champion weightlifter, raises 240 kg a distance of 2.35 m. How much work is done by Brutus lifting the weights?

asked by sierra on January 11, 2011
65. ## Geometry

Please Help! How do I work this? The Volume of the box is represented by (x^2+5x+6)(x+5). Find the polynomial that represents the area of the bottom of the box.

asked by Tim on September 10, 2007
66. ## ATTENTION WRITEACHER!

Thanks so much for your help on my english question. I posted a reply with another question down below. You're REALLY smart so can you please check my work that i put donw below! thanks again, i really appreciate it:)

asked by Miley on February 26, 2008
67. ## physics

A weightlifter is trying to carry a 10 kg weight held over his head across the room. How much energy will be required to do this work on the 10 kg weight?

asked by Anonymous on May 7, 2012
68. ## Geometry

Please Help! How do I work this? The Volume of the box is represented by (x^2+5+6)(x+5). Find the polynomial that represents the area of the bottom of the box.

asked by Tim on September 10, 2007
69. ## biology

What part of the brain controls sleep and how does it work. I am looking for a easy to understand answer because when i have searched i do not understand it.

asked by Sara on April 9, 2012
70. ## Physical Sci

John used a force of 300 N to push his younger brother in a wagon for 50m. How much work did John do?

asked by James on November 16, 2012
71. ## Works Cited alphabetize

I know that Works Cited pages go in alphabetical order according to the author's last name. How do you decide which work goes first when you have two works by two authors that have the same last name?

asked by Shylock on April 3, 2014
72. ## PHYSICS

A BOY OF MASS 50KG CLIMBS UP 29 STEPS EACH 20CM HIGH.HOW MUCH WORK IS DONE BY THE BOY (G=10M/S)

asked by CHINONS on March 4, 2019
73. ## MATH

You get paid \$12 per hour and need to make at least \$460 this week to pay your bills. How many hours do you need to work this week?

asked by Problem Solving on December 3, 2015
74. ## Algebra

Let f(x) = e^(x – 2) + 3. Answers can be stated without additional work/explanation. Describe in words how the graph of f can be obtained from the graph of y = e^x.

asked by Alicia on July 31, 2009
75. ## Math

Gasoline is about \$2 per gallon. You use about 1 1/2 gallons each day driving to and from work. How much should you budget for gasoline over the next month (about 20 workdays)?

asked by Anonymous on November 1, 2009
76. ## math

The factors of X^4-13x^2+36 when factored completely are I did x^2(x^2-4)(x^2-9) (X+3)(x-3)(x+2)(x-2) it was multiple choice 1. (x^2+9)(x^2+4) 2. (x^2+9) (x+2)(x-2) 3. (X+3)(x-3)(x+2)(x-2) 4. (x+3)(x+3)(x+2)(x+2) my answer is choice 3. Thanks for checking

asked by sara on October 20, 2018
77. ## Math 222

How do I write this problem as a single fraction? Sorry my addition button doesn't work. 2x plus 7y 2x plus 5y ____________ - ____________ plus 2 8x 2x

asked by Tika on April 24, 2015
78. ## physics

how can the work done to an object be the same amout as the potential energy when sitting on an incline plan.. (the object is a marble)

asked by jojo on January 12, 2011
79. ## physics

how can the work done to an object be the same amout as the potential energy when sitting on an incline plan.. (the object is a marble)

asked by jojo on January 12, 2011
80. ## physics

A 1.53×10 3 kg car accelerates uniformly from rest to 13.6 m/s in 2.44 s. What is the work done on the car in this time interval? Answer in units of J

asked by Anonymous on November 15, 2012
81. ## Physics

A child pulls a toy across the floor. Is the work done on the toy positive or negative? Explain your reasoning.

asked by Anonymous on December 10, 2006
82. ## science

a person rolled a large ball across a field. What information is needed t determine how much work the person did?

asked by Jason on March 24, 2015
83. ## Math

From a group of 10 players a team 4 will be chosen for a dodgeball team. How many different teams are possible. 10 nCr 4 =210 but how can I work it out.

asked by Keonn'a on October 29, 2018
84. ## Math

Simplify the radical expression by rationalizing the denominator. 8(radicand)48/(radicand) 112x Please explain how to work this.

asked by Jane on February 28, 2012
85. ## physical science

if an engine must do 500 joules of work to pull a 10 kg load up to to a height of 4 meters ,what is the efficiency of the engine ?

asked by llulia on August 3, 2010
86. ## physics

The efficiency of an electric motor is 20 %. When lifting a body 500 J of energy are wasted. What is the useful work done by the motor? please and thank u!

asked by flirtyme on January 19, 2018
87. ## physics

In one cycle, a heat engine absorbs 4400 J at 500C and exhausts 400 J. How much work does it do per cycle?

asked by Nadya on November 18, 2010
88. ## physical science

A worker pushes horizontally on a large crate with a force of 312 N, and the crate is moved 6.5 m. How much work was done?

asked by Anonymous on February 11, 2012
89. ## Science

Two cars have the same mass, but one is moving three times faster than the other. How much more work will be needed to stop the faster car?

asked by Dee on February 14, 2009
90. ## math

Use the distributive property to write an expression that is equivalent to the example below: 5(2x + 7) I think my answer is... 45.....How I got this answer was 5 x 2 + 5 x 7=45 10 + 35 = 45 Can you please double check my work?

asked by Donald on November 25, 2016
91. ## physics

An object of mass m=2kg travels up an incline to a vertical height of 3m. What is the work done on the object by gravity?

asked by derek on November 3, 2010
92. ## Law

In special circumstances is it possible for an agent to legally work for the interest of another agent or third party while representing a principle?

asked by V on December 6, 2017
93. ## Math Algebra

What is the value of expression 2x squared + 3xy-4y squared when x=2 and y=-4? I will be happy to critique your work on this. Substitute the numbers in, and add.

asked by Francine Patton on May 22, 2007
94. ## government

the exclusive legal right an author has to his or her own work is protected by a. a patent b. a copywrite c. legal tender d. bankruptcy

asked by jere on January 11, 2008
95. ## Emily.

Find the interval(s) where this function is increase and the interval(s) where it is decreasing: g(x)=e^(-x) Any work shown would also be greatly appreciated. Thank you!!

asked by Math/Calc on November 20, 2012
96. ## algebra

find F(2) for the polynomial shown below. F(x)=(x^4)-(2x^3)+(3x^2)-(10x+3'0 Substitute 2 for x in the polynomial to work this out. Be sure to watch your signs! I hope this will help.

asked by bailey on January 17, 2007
97. ## math

Could you please assist me on how to work this problem? A student wrote 5 + 24+6=5 + 25 + 24 + 6 by the associative property. what error did the student make?

asked by Unknown on September 5, 2012
98. ## Chemistry

How many grams of iron can be recovered from 11.8 kg Fe3O4? I tried to multiply 11.8 kg by the percent composition of iron, but that didn't work.

asked by Anonymous on January 13, 2016
99. ## science

write up a conrol group and a experimaental group I will be happy to critique your work on this. You almost need a hypothesis to be tested to do this.

asked by jessika on September 14, 2006
100. ## Astronomy

A bicycle trip takes 50.4 seconds. What is the average speed of the bicycle? my work: 50.4/ 680m = 13.49m/s

asked by Frustrated! on September 2, 2015