# 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 18
1. ## algebra

If a system has an infinite number of solutions, use set-builder notation to write the solution set. If a system has no solution, state this. m - 2n = 16, 4m + 4 = 1

asked by Anita on December 5, 2010
2. ## Math

An area is bounded by the x-axis and the parabola y = 16 - x^2. Use four rectangles of equal width and the midpoint approximation method to estimate the bounded area. Could you please show me how to work out this problem? Thanks!

asked by Johnny on May 21, 2016
3. ## Completing the square

Please show the procedure for answering this quadratic equation using the completing the square method: x^2+14x+98 I think i understand the basics of the method, but in this particular question I'm finding it hard to use the appropriate factors of 98 - 7

asked by Barbie on May 20, 2011
4. ## math

solve gauss jordan elimination 6w-2x-4y+2z=2 3w-3x-6y+z=-4 -12w+8x+21y-8z=8 -6w-10y+7z=43

asked by rehuel on January 24, 2019
5. ## math-PLEASE HELP ASAP

Solve using elimination.......answers must be in ordered pair form....(this is the last one I am confused on) 4x-9y=6.5 7y-2x=-4.5

asked by Michelle on July 13, 2010
6. ## math

I need help on this math problem Solve the systems of equations by elimination. -2x+y=7 6x+12y=24

asked by pdub on February 6, 2011
7. ## MAT 101

Solve for X and Y in the following problems using either substitution or elimination methods. 2X + 5Y = 19 , 3X + 3Y = 15 4X + Y = 22 , 2X + 3Y = 16 12X + Y = 174 , 8X - 2Y = 36

asked by SEMA , Need Help on March 9, 2010
8. ## Math

Solve by Elimination 2x+3y=2 4x+6y=4 I got the answer there are infinitely many solutions I hope this is correct? Please help

asked by ALLISON on September 23, 2011
9. ## math

how do you solve x+y=2000;6x+8y=14400 using gauss-jordan elimination medthod?

asked by Anonymous on August 4, 2011
10. ## Math

Could someone give me an example of a linear eqution using elimination to solve the systems of equations?

asked by Angel on January 2, 2012
11. ## new age math

A value of the number k for which there is either no solution or an infinite number of solutions for (y,v) to the system of equations show below 7y-9v=-9 Ky+7v=7

asked by Melissa on February 6, 2011
12. ## Unit 1 lesson 7 math

1. if MNO is = to QSR witch of the following is true? 2.The triangles shown are congruent. Find the measure of P 3.Which congruence statement says the same thing as ABC = DFE 4.Note: Remember to show all of the steps that you use to solve the problem. Be

asked by Addison C on January 31, 2018
13. ## Algebra

Mildred makes \$3 an hour babysitting and \$6 an hour when she works at Wendys. Her parents do not want her working more than 20 hours per week. Mildred would like to earn at least \$70 a week. Write a system of inequalities that show the number of hours she

asked by Tara on February 5, 2012
14. ## physics

my answer for these are 1. a 2.c 3 d but not sure so please anyone see if i am correct 1. In which of the following cases is work done on the object? A. Lifting an object off the floor. B. Pushing an object, but it does not move C. Carrying an object at a

asked by jasmine on November 6, 2011
15. ## math-please check my answer!!

5x-7y=-14 7y-5x=14 what is the solution of the system of equations? ANSWER IS B??? A) A point B)Infinitely many solutions C) no solution Is the system consistent ot inconsistent? ANSWER IS CONSISTENT Is the system dependent or independent? ANSWER IS

asked by Michelle on August 1, 2010
16. ## math

how do you write 1 divided by 8 on paper? im doing a quiz that i have to show my work i know it eqauls .125 but i get half my grade taken off if i dont show my work. can anyone help

asked by lol on November 15, 2018
17. ## Algebra

Check my answer- Solve the system of equations algebraically. Show all of your steps. Y=x^2+2x Y=3x+20 My answer: X^2+2x+3x+20 X^2-x-20 (x-5),(x+4)=0 x=5, x=-4 y=35, y=8 Thank you!

asked by Angel on April 3, 2017
18. ## L Pre-Cal

Hey! I'm getting stuck on how to solve this system of linear equations. Can anyone show me step by step Thanks! 3x-5y+5=1 5x-2y+3z=0 7x-y+3z=0

asked by Norah on January 26, 2011
19. ## Algebra 2

can someone show me how to do it step by step please! Use a graph and table to solve each system. check your answer {y+x=5 {3x-5y=-1

asked by Ren on October 16, 2010
20. ## Physics

A 6090kg space probe mobing nose-first toward Jupiter at 105m/s relative to the Sun, fires its rocket engine ejecting 80 kg of exhaust at a speed of 253 m/s relative to the space probe. What is the final velocity of the probe? I should have gotten 108m/s

asked by Tammy on February 2, 2007
21. ## PreCalc

Approximate the solutions to the following equation on the interval [0,2π). Round your answer to four decimal places. sinθ=0.65 Apparently, there suppose to be two answers to this question with a comma separating​ both answers. I know because I've

asked by chizoba on August 15, 2016
22. ## Calculus Help Please Urgent!!!

find the limit algebraically. Use L'Hospital's Rule where appropriate. If there is a moare elementary method, consider using it. If L'Hospital's Rule doesn't apply, explain why lim -> 0 (cot(x)-(1/x)) show work please!!!

asked by Selda on April 13, 2014
23. ## PLZ Check my Science Project's summary?!

The following r the instructions to my Project: - Compose a scientific summary of your method, observations, data, and conclusions. In addition, be sure to answer the questions below in your report. 1. Why does the first method for determining volume work

asked by Natasha on January 4, 2016
24. ## Algebra HELP

USE LINEAR COMBINATIONS TO SOLVE THE SYSTEM OF LINEAR EQUATIONS (please show steps) 1) -X+8Y=16 2) 4X+5Y=-2 3)4Y=15-3X 3X+4Y=36 5X-4Y=-23 2Y=3X+21

asked by electra on December 13, 2007
25. ## math

can someone explain step by step to solve system equations and example ill show here 3x+4y=-2 x=-2y

asked by sherri on January 13, 2009
26. ## Physics

In which of the situations listed below is energy being transferred as heat to the system in order for the system to do work? In which situation is work being done on the system in order for energy to be transferred from the system as heat? a. Two sticks

asked by Edward on March 29, 2010
27. ## Accounting

On August 31,2010, Chickasaw Industries issued \$25 million of its 30-year, 6% convertible bonds dated August 31, priced to yield 5%. The bonds are convertible at the option of the investors into 1,500,000 shares of Chickasaw's common stock. Chickasaw

asked by Cindy on May 9, 2013
28. ## algebra

The sample size needed to estimate the difference between two population proportions to within a margin of error E with a confidence level of 1- alpha can be found by using the equation shown below. Replace n1 and n2 by n and solve for n. E= z alpha/2

asked by Mario on October 30, 2013
29. ## algebra

can you show me how to do these problems solve the equation by finding the exact solution 1/3x-2=2 b) 1/3log(x)-log(100)=2 c)ln(x)-ln(5)=7

asked by missfubu-c on October 23, 2012
30. ## Algebra 1

You can mow your whole lawn in 45 minutes, and your neighbor can mow your whole lawn in 30 minutes. How long would it take you to mow the lawn together? Clearly show and explain each step for full credit. Using rational applications A. Write an equation

asked by Daniel on May 5, 2013
31. ## algebra

A man invested half of his money at 5%, one-third of his money at 4%, and the rest of his money at 5.5%. If his total investment income was \$570, how much had he invested? and please show me the solution to solve this problem. thanx sorry bobpursly I cant

asked by aj on February 25, 2012
32. ## Math

I need help!!!! 7th grade Enter your answer and show all the steps that you use to solve this problem in the space provided. It takes Pam 45 minutes to drive to work and 60 minutes to drive home from work. Write the ratio of the time Pam spends driving

asked by Luna213 on January 10, 2019
33. ## College Algebra

Translate the problem into a pair of linear equations in two variables. Solve the equations using either elimination or substitution. State your answer for both variables. An orchard operator must dilute 11 quarts of a 60% insecticide solution by adding

asked by Ashley on January 28, 2010
34. ## Chemistry

What volume of 0.5M HNO3 is required to neutralize 25 cm3 of a 0.2M NaOH solution? please show work and detail.

asked by Paige on January 15, 2009
35. ## CHEMISTRY

Describe how you would prepare 250. mL of a .500 stock solution of sodium hydroxide. (show all work)

asked by TYLER on October 28, 2012
36. ## physics- response to bobpursley

which is false? Consider the following processes: I. Energy flows as heat from a hot object to a colder object II. Work is done on a system and an equivalent amount of energy is rejected as heat by the system III. Energy is absorbed as heat by a system and

asked by matt on June 24, 2009
37. ## algebra/what am I doing wrong Please help

Solve the system by graphing. (If the system is inconsistent, enter INCONSISTENT. If the system is dependent, enter DEPENDENT.) 3x+2y=5 4x-3y=1 I have try dependent and inconsistent and either work. What am I doing wrong. Thank you

asked by Mary Ann on June 11, 2014
38. ## Math

What is 50x50 and why pls show work (don't show adult work I'm in 6 grade I'm not going to understand lol)

asked by Vanessa on August 29, 2016
39. ## HELP!

The problem using elimination/substitution methods what is the solution set to 3x -2y =-4 and 5x=2y the choices a)(2,-5) b)(-2,-5) c)(2,5) d)(-2,5) Please, Please, Please, HELP! Between a and c I believe it is c is that correct? Yes.

asked by Anonymous on January 16, 2007
40. ## chemistry

What is the change in internal energy (in J) of a system that absorbs 0.246 kJ of heat from its surroundings and has 0.771 kcal of work done on it? Is this correct? 0.246, kJ x (1000 J/1 kJ) = 246 J 0.771 kcal x (4184 J/1 kcal) =3225.86 j 246 J + 3225.86 J

asked by patrick on October 14, 2015
41. ## Social Studies

What was the Incan mita system? A. labor as payment for taxes++ B. a method of counting C. the division of land among government, priests, and the people D. the Incan social system

asked by dori on January 1, 2019
42. ## Intermediate Algebra

solve equation (x+1)(x-2)=54 Eric stated that the solution would be (x+1)=54==> x=53 or (x-2)=54==> x=56 However at least one of these solutions fails to work when substituted back in the orginial equation. Why is that? Please help Eric to understand

asked by ladybug Please Help!! on June 18, 2012
43. ## algebra 2

factor completely 3x^2-14x-24 I do not see the gcf for the problem I am totally lost can some explain please I have several these problems and i need to figure out how to solve them You put 3x^2-14x-24 = (a x + b)(c x + d) Equating the coefficients on both

asked by CINDY on May 18, 2007
44. ## algebra

the system of equations 3x -6y=20 and 2x-4y=3 Is dependent consistent inconsistent independent I think its inconsistent because somehow i ended up with 12=49.. can u show me the work too.I think i did it wrong.

asked by CAs on December 11, 2010
45. ## Algebra 2

More About Complex Numbers: Solve x and y 4x+5y+13i=7+(6x+5y)i Please show work because I had a hard time finding the answer

asked by Alicia on November 18, 2014
46. ## Calculus

Solve the exponential equation for t. Round your answer to three decimal places if necessary. e^(0.08t)=4 Please show work

asked by Brett on November 6, 2011
47. ## Help With Math

Using the quadratic formula to solve equations. -12^2 + 12 x-9 = -7x^2 10x^2 + 5x + 12 = 0 6x^2 + 12x = - 1 11x^2 - 7x -1 = 0 2x^2 -18x + 16 = 0 Can u show work to help me out

asked by Monte' on November 13, 2007
48. ## Algebra

Solve the equation. Check all proposed solutions. Show work in solving and in checking. Root3-x = x-1

asked by Angie on July 7, 2009
49. ## Math - 2

Solve the exponential equation. Express your solutions in exact form only. Please show all of your work. (e^(2x) – 10e^x) / 13 = 3

asked by Allison - Carson on June 9, 2011
50. ## precalculus

solve the exponential equation express in exact form only show all work. 2e^x= squareroot 10e^x +3

asked by Sara on January 11, 2012
51. ## Math - Exponential equation

Solve the exponential equation. Express your solutions in exact form only. Please show all of your work. 5e^(x log(9)) = 11

asked by CheezyReezy on June 6, 2011
52. ## algebra

Solve the following inequality and write answer using interval notation. Please show all of your work. 2x-5/3x^4-x^3+275x-125>=0

asked by sarah on January 18, 2012
53. ## Algebra

Solve the equation. Check all proposed solutions. Show work in solving and in checking. sqrt3-x=x-1

asked by Katlyn on July 8, 2009
54. ## creative activities in other curriculum areas

which one of the following methods is preferred for teaching songs from recordings to young children? a-the phrase-wise method b-the whole-song method c-the combination method d-the strong-melody method

asked by nikki on December 6, 2010
55. ## Math

I have been asked to solve the following system of linear inequalities by graphing. I tried replacing with various numbers but even though the they work in the equations my graphs change from consistent to inconsistent. Please help.

asked by Aman on May 26, 2007
56. ## CALCULUS

show that f(x) = x^2-1 (x is greater than and equal to 0) and g(x) = root(x-1) (x is greater than and equal to -1) are inverse functions. when i try f(g(x)) = x and g(f(x)) = x to show that the two functions are inverses it doesn't work because i am not

asked by joey on February 15, 2009
57. ## algebra

Solve the system of equations algebraically. Show all of your steps. y=x^2+2x **y=x^2+2x (2/2)^2=1 1=answer** y=3x+20 **y=3x+20 (3/2)^2=2.25 2.25=answer** am i right or wrong, if im wrong could someone show me the steps

asked by ANoNyMouS on April 29, 2019
58. ## Algebra II

What is the solution of the system of equations? {-3x - 4y - 3z = -7 {2x - 6y + 2z = 3 {5x - 2y + 5z = 9 A. (5,-2,7) B. (-5,2,7) C.(5,2,-7) D. No solution Use a matrix to find the solution to the system of equations. {-8x - 8y = -16 {6x - 9y = -108

asked by HELPME on September 27, 2018
59. ## Grade 11th Maths

(Second time posting this problem)This problem is related to Chapter-Sets. Please solve the question using x method. x method means x ∈ A ∩ B Q. If A⊂B, then prove that B'⊂A'

asked by Akashdeep Singh on July 4, 2010
60. ## Calculus

You are using Newton's method to solve e^x - 2. If you first guess is x1=1, what value will you calculate for the next approximation x2? ...I don't know what Newton's method is, so I looked it up...and I'm still confused. Help plz? Thx

asked by Anonymous on June 1, 2010
61. ## physics

1. In which of the following cases is work done on the object? A. Lifting an object off the floor. B. Pushing an object, but it does not move C. Carrying an object at a constant velocity D. None of these 2. The energy of a system increases when A. a force

asked by kiren on November 6, 2011
62. ## chemistry

You are given a 500 mL stock solution of 10%CaCl2 and are askes to prepare a 50 mL solution of .5% CaCl2. How would you prepare it? Please show work

asked by morgan on February 6, 2017
63. ## Algebra 2

How many liters of water must be added to 8 liters of a 40% acid solution to obtain a 10% acid solution? Please Show All Work!

asked by Trisan on October 18, 2009
64. ## Grade 11th Maths

(Second time posting this problem)This problem is related to Chapter-Sets. Please solve the question using x method. x method means x ∈ A ∩ B Q. If AUB=Ø, then prove that A=Ø,B=Ø

asked by Akashdeep Singh on July 4, 2010
65. ## Math

Every moment of every day, light pours out from the Sun at the center of our solar system and travels to Earth. It does not arrive at Earth instantaneously though; it takes time to get here. Your task is to figure out how long it takes for light to travel

asked by Danielle on February 18, 2014
66. ## math (A question for Reiny)

THANK YOU SO MUCH for the help with magic squares! But I have one quick question- how can I show my work! I have to show my work or I receive like 1/2 credit.

asked by Anonymous on August 25, 2010
67. ## 5th math

my teacher want me to show the work on this problem like < or > 3.67---3.7 shwo want to know how i got the answer cause, i know that 3.67 is greater than 3.7 she said where you work? can you show me one more time .?

asked by pat on October 22, 2010
68. ## CIS 105

As you have discovered, there are a variety of computers available, from the smallest computer in a domestic device to the supercomputers used in industry. Despite the different uses of computers, they all have basics elements in common—each computer

asked by Sunny on June 12, 2010
69. ## Chemistry

A solution of ethanol has a concentration of 4.613 mol/L at 20ºC. The density of the solution is 0.9667 g m/L.. Calculate the molality of the solution..please show the solution..thanks a lot

asked by Syam on July 5, 2014
70. ## pre-calculus 11

I am asked to solve the absolute value equation of |1/2x +1| =x+1 graphically. I can solve this algebraically and consider two cases for the absolute value one being positive and the other negative. I know this will be a straight line and when I solved it

asked by george on June 14, 2015
71. ## pre-calculus 11

I am asked to solve the absolute value equation of |1/2x +1| =x+1 graphically. I can solve this algebraically and consider two cases for the absolute value one being positive and the other negative. I know this will be a straight line and when I solved it

asked by george on June 10, 2015
72. ## Math ....urgent help

i just don't get this elimination method ..... plz help me plz.....teach me how to keep the x and y in a parallel line. and which number to multiply.....plz help -5x-4y=-11 10x=-6-y help me plz......

asked by vero on January 7, 2009
73. ## Algebra

I understand that systems of equations can be solved by graphing or by using substitution or elimination. But I cannot think of any pros or cons so... What are pros and cons of each method?

asked by Lynn on June 10, 2010
74. ## Chemistry. Please help!

For the problems below, I have the answers written but from questions d-i, I don't understand how they got the answer. I tried doing it and somehow I messed up with the formula with 3/2 and 5/2 so please show work on how they got the answers for d-i. In

asked by JJ on February 28, 2012
75. ## CALC 2 - Partial Functions!!

How do I solve Integral of 7/(16-x^2) I know I must break down (16-x^2) into (x+4)(-x+4), but after I do that what is next? Using the method of partial fractions, convince yourself that 7/(16-x^2)= (7/8)*[1/(4+x) + 1/(4-x)] The two additive terms can be

asked by Ace on June 13, 2007
76. ## PHYSICS HELP

I am having a real problem with this question. Through the process of doing work, energy can move between the external world and the system as the result of forces or work. I say it's forces, but someone else says it's work because only work and energy can

asked by Pat on January 10, 2007
77. ## math

how can i solve for x given this?? pls. show detailed solution..just can't figure it out.thanks in advance! 6cosx+3cos35cosx-3sin35sinX=7cosx

asked by cara on December 3, 2015
78. ## math,algebra,correction

Is this correct: solve using the quadratic equation: 5x^-4x+1=0 My answer: x= (2)/(5) +/- (1)/(5)i Or should i combine the denominators to look like this: x= (2+/-1)/(5) i I don't like where you show the i I would write the solution as (2 +-i)/5 or 2/5

asked by jasmine20 on April 16, 2007
79. ## math

how can i solve for x given this?? pls. show detailed solution..just can't figure it out.thanks in advance! 6cosx+3cos35cosx-3sin35sinX=7cosx

asked by Cara on December 3, 2015
80. ## Physics

This is a question related to work. Today we had a pop quiz in my physics class and I am just trying to check my work here :D 1) if there is a 5 kg block on a horizontal table connected with string to a 3 kg block hanging off the side of the table through

asked by William on October 20, 2014
81. ## chemistry 1st year, for midterm help

Hi, Can any1 help with theses questions. I need to solve these because there will be similar questions on the midterm for me, coming week. Btw I have tried few. 1. How many milliliters of a 15.0%, by mass solution of KOH (Aq) ( d= 1.14g/mL ) are required

asked by ur class fella on February 11, 2009
82. ## Math

Please help me with this step by step show your work problem. |-4b-8|+|-1-b^2|+2b^3 (b= -2) My work |-4b-8|+|-1-b^2|+2b^3 |-4(-2)-8|+|-1-(-2^2)|+2(-2^3) |8-8|+|-1-4|-16 8+8+5-16 16+5-16 5 Could you check my work? If it is incorrect, could you show me the

asked by Lucy on September 26, 2016
83. ## Grade 11th Maths

This problem is related to Chapter-Sets. Please solve the question using x method. x method means x ∈ A ∩ B Q. For any sets A and B. Prove that A∩B⊂A and A∩B⊂B.

asked by Akash on June 29, 2010
84. ## calculus

find the points at which the graph of 4x^2 - 4x + 12y^2 -6y = 10 has a vertical and horizontal tangent line. For the vertical only solve for y and for the horizontal only solve for x. I got the deriviative to be: (8x-4)/(-24y + 6). For the horizontal, x =

asked by kaley on November 2, 2009
85. ## kaley

find the points at which the graph of 4x^2 - 4x + 12y^2 -6y = 10 has a vertical and horizontal tangent line. For the vertical only solve for y and for the horizontal only solve for x. I got the deriviative to be: (8x-4)/(-24y + 6). For the horizontal, x =

asked by math on November 2, 2009
86. ## Chemistry

Calculate the molality of a solution prepared by dissolving 225.5 g KNO3 in 825mL of water. Show your work

asked by Kayla on June 2, 2016
87. ## Physics

Work done by conservative forces change only A)PE of the system B)KE of the system C) ME of the system D)None of these

asked by Nikita on December 24, 2016
88. ## Calculus

How can i factor x^3 - 3x^2 + x -4? I tried the factor theorem method, but it doesnt work. Is there another method for factoring cubic equation? Is there a formula that one can use?

asked by LALA on April 3, 2010
89. ## algebra

a two digit number is four times the sum of its digits and twice the product of the digit. find the number using elimination method

asked by abhishek on June 12, 2011
90. ## physics

which is false? Consider the following processes: I. Energy flows as heat from a hot object to a colder object II. Work is done on a system and an equivalent amount of energy is rejected as heat by the system III. Energy is absorbed as heat by a system and

asked by matt on June 24, 2009
91. ## algebra

Solve the following system of equations for the unknown variables. x + y = 12 x – y = –2 (NOTE: Show answer in the following format (#,#). If not entered in this format, will be scored incorrect.)

asked by Jacqueline on July 5, 2012
92. ## Chem 12

Okay, this is a two-part question and the unit is acids and bases. Ka for NH4 is 5.6 x 10^ -10 Kb for NH3 is 1.8 x 10^ -5 1. Determine the pH of a solution prepared by adding 0.0500 mole of solid ammonium chloride to 100mL of a 0.150 molar solution of

asked by Kevin on March 27, 2007
93. ## Algebra

Please help to find x, y 1. 8x-y=17 6x+y=11 2. 5x-2y=17 2x+3y=3 Question no.1 8x-y=17 6x+y=11 (adding the equation) __________ (-y and +y will be 0) 14x =28 Taking variables to one side x=28 __ 14 14*2=28 therefore x=2 substitute this value of x in

asked by Tamia on May 18, 2007
94. ## algebra

1. Tell whether the system has one solution infinitely many solutions or no solution. 6y=-5x+24 2.5x+3y=12 a. one solution b. infinitely many solutions*** c. no solution i know its B but can you solve it step by step for me thank you

asked by Leslie on December 12, 2016
95. ## MATH

Write a two-step equation that needs the steps of addition then multiplication in order to be solved, and then solve it. Show your work.

asked by leya on May 24, 2012
96. ## college algebra

solve the following inequality. write the answer in interval notation x^3-4x^2-21x

asked by alli on August 19, 2012
97. ## pre calc

write the form of the partial decomposition for the given rational expression. Don't solve for constants: 8x+10/x^2+7x-18 please show work!

asked by esora on May 12, 2011
98. ## Chemistry

How many grams of water vapor (H2O) are in a 10.2 liter sample at 0.98 atmospheres and 26°C? Show all work used to solve this problem.

asked by Victoria Ann on March 19, 2011
99. ## chem

How many grams of water vapor (H2O) are in a 10.2 liter sample at 0.98 atmospheres and 26°C? Show all work used to solve this problem.

asked by alex on February 8, 2012
100. ## Pre-Calculus

A car manufacturing company (the Company) can produce a car for \$3000.00 and a truck for \$5000.00. Suppose "C" cars and "T" trucks are sold to the dealer at mark-ups, respectively, of 20 and 30 percent. If the Company made a profit of \$27 million on sales

asked by Andrea on July 24, 2008