# 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

91,330 questions, page 17
1. ## Rational Inequality with Absolute Value

Here's a question I'm having trouble with: |x|/|x+2|=0 and x+2>0, x must be greater than or equal to zero. When I solved for x in this case, I got x>-4. Reconciling the constraints leaves me back at x>=0. Did I do that correctly? Case 2: x is greater than

asked by Randy on March 26, 2011
2. ## 8th G-Math

Write an equation and show all work. One Monday, 405 students went on a trip to the zoo. All 7 buses were filled and 6 students had to travel in cars. How many students were in each bus? (My teacher taught the class but no one even understand, can you

asked by Cassidy on September 22, 2013
3. ## chemistry

How many g of NaOH is needed to make 300.0 mL of a 20 % (w/v) solution? please please show all work I'm very lost

asked by Thomas Ruger on April 2, 2017
4. ## math

Determine the solution of the following systems of linear equations using elimination. 2x + 3y = 7 x – 2y – 4 = 0

asked by jordan on December 20, 2015
5. ## math

Determine the solution of the following systems of linear equations using elimination. 2x + 3y = 7 x – 2y – 4 = 0

asked by jordan on December 20, 2015
6. ## algebra

Solve each of the following systems by using either addition or substitution. If a unique solution does not exist, state whether the system is dependent or inconsistent. 10x+2y=7 y==5x+3

asked by Becky on December 27, 2007
7. ## A number thoery question

Please help me! Thank you very much. Prove Fermat's Last theorem for n=3 : X^3 + Y^3 = Z^3 where X, Y, Z are rational integers, then X, Y, or Z is 0. Hint: * Show that if X^3 + Y^3 = Epsilon* Z^3, where X, Y, Z are quadratic integers in Q[sqrt(-3)], and

asked by kate on November 15, 2006
8. ## algebra

Please check my system of linear equations using any algebraic method. Show the check,if possible. 8x-6y=12 / 12x-9y=18 8x-6y=12 (eq.1) 12x-9y=18 (eq.2) 4x-3y=6 (eq.1) 4x-3y=6 (eq.2) y=4x-6 / 3 Check: Thank you for your help.

asked by Anneliese on December 26, 2016
9. ## Algebra

Find two consecutive positive integers such that the sum of the square is 85..(show your work) If X is the first integer, then X+1 is the next; therefore, the sum of those squares will be 85. X^2 + (X+1)^2 = 85 Solve for X, then add 1 to it for the second

asked by Tomika on June 13, 2007

Calculate the new molarity if each of the following dilutions is made. Assume the volumes are additive. (a) 52.3 mL of water is added to 27.1 mL of 0.124 M KOH solution (b) 110. mL of water is added to 54.2 mL of 0.808 M NaCl solution ((please show work,

asked by Jasmin on November 10, 2010
11. ## Math

Mrs.Perry hires a landscaper that charges \$15 per hr. The landscaper says the total charge for the work done is \$120.00 Write an inequality to show h, the number of hours it took to do the work and solve the inequality.

asked by Amy on March 16, 2016
12. ## calculus

prove that 5x - 7 - sin3x = 0 has at least one zero and prove that it has exactly one real zero. How am I supposed to show my work for this? I don't really understand how to show my work for the IVT. Without that I can't do any work for the MVT.

asked by Rob on December 16, 2011
13. ## Algebra Help

Please solve and check all proposed solutions. Show work for solving and checking: (x-2)/(x-1) + (2)/(x^2-1) = 0

asked by Jessica on August 3, 2009
14. ## Algebra

I can't figure out this problem... 2x-2-(x-1) = 4-1+x-(-3x) solve for x Will you also show your work and check step Thanks, :)Juliet

asked by Juliet on December 6, 2011
15. ## Chemistry

HA(aq) H+(aq) + A-(aq) K = 5.0 x 10 -9 The initial concentration of HA is 0.30 M What is the final equilibrium concentrations of HA, H+, A-? Show work, solve if you can

asked by Kay on April 12, 2018
16. ## Algebra 2

4Xsquared+7x+3 find the quadratic equation by factoring to solve. Show work

asked by Andres on November 9, 2009
17. ## Math

Solve and check. ( 3 marks) 5/(x-1) + 2/(x+1)=-6 Here's my work on it: 5/(x-1)+2/(x+1)=? 5/(-3/2-1)+2/(-3/2+1)=-6 Can you show how I would have found x in this situation and also if I went wrong anywhere.

asked by Alex on January 9, 2015
18. ## algebra

Simplify using long division.Show all work. (-72-4x^2+8x^3-36x)/(x-3) Also,please solve (8b^3-6)/(2b-1) I greatly appreciate your help.

asked by Jack on January 12, 2017
19. ## Algebra

Please solve the Linear Equation of P = 200(10)+6000 Please show work in all steps

asked by Anna on December 3, 2008
20. ## Math- Problem3

Solve the following inequality and write your answer using interval notation. Please show all of your work. (1 / (x+8) ) ≤ ((8-5x)/43)

asked by Greg - PV on June 9, 2011
21. ## Geometry

solve for x and AC if C is between A and B, AC = 3x + 55, CB = 2x and AB = 65. Draw figure and show algebra work. Can someone help me please I don't quiet get it?

asked by SiSi on August 26, 2015
22. ## Algebra

how do you solve this quadratic equation? tickets= -0.3x^2+12x+10 Please show the work so I can understand.

asked by CathyT on August 11, 2011
23. ## algebra

Solve and check all proposed solutions. Show work for solving and for checking. x+1/x-1 - 2/x^2-x=0

asked by math help on December 5, 2010
24. ## algebra

d=(1/2)at^2; solve for a. i got a=d/([1/5])t^2) but i don't see that in any of the possible responses: a. a= (2d)/t^2 b. a= 2dt^2 c. a= (dt^2)/2 d. a= d/2t^2 What did I do wrong? & can you please show detailed work?

asked by Ana-x00 on October 14, 2010
25. ## Algebra

Solve using set builder notation, show all work. 12x-25 is greater than or = to 3x-5(x+6)

asked by Ellen on July 28, 2012
26. ## chem/math

I need to fid the activation energy but i forgot how to solve for Ea 4.58*10^-15=e^(Ea/2537.02) can you show the work thank you

asked by help on October 28, 2010
27. ## Algebra 1

I know the answers, I just don't know how to solve it and show my work. 1. (3√6 + 5√10)^2 - 286 + 60√15 2. (2 + √10)(2 - √10) - -6 3. y = √6x-18 - x (greater then or equal to) 3 Thank you

asked by Wes on March 13, 2017
28. ## math

solve each of the following equations by factoring and show your work 12x² + 15x + 10= -10x -2

asked by Derek on September 7, 2008
29. ## algebra

which method do you use to solve this equation.(x-1)^2=7. Is it the factoring method or the sqare root method I would take the square root of each side. (x-1)= +- sqrt7 Now for the factoring method: (x-1)^2=7 (x-1)^2-7=0 you have a difference of two

asked by Tony on May 17, 2007
30. ## Number Systems of Mathematics

Solve using elimination and express answer as ordered pair: 2x + 3y = 7 x + 5y = 7

asked by James on January 1, 2016
31. ## Algebra 2

maximize p=6x+10y minimize p=14x+9y use elimination to solve: 4x+5y=41 7x+5y=53 -4x-y=-16 -4x-5y=-32 2x-4=8 x+2y=9 9x-5x=13 4x-6y=2

asked by Roman on April 16, 2013
32. ## math

Solve the systems of equations by elimination. 1. -2x+y=7 2. 2x+y=-9 6x+12y=24 4x+3y=1 3. 7x+3y=-1.5 4.2x-3y=-0.27 2x-5y=-30.3 5x2y=0.04

asked by pam on February 4, 2011
33. ## algebra 1

3a+b=52a+5=10use elimination to solve each systems of equations.

asked by Anonymous on March 20, 2013

Solve using elimination.......answers must be in ordered pair form 0.3x-0.2y=4 0.4x+0.5y=-55/17

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

Solve using elimination.......answers must be in ordered pair form 1) 5x+5y=-11 7x-2y=17

asked by Michelle on July 13, 2010

reed's bookstore is open 9 hours each day. it opens at 9:30a.m. when does it close? i know the answer but i don't know how to show my work. please help. Two ways to do it. 12:00 noon - 9:30 = 2:30 hours in the morning. That leaves 6:00 hours - 2:30 minutes

asked by zeke on April 24, 2007
37. ## Math

1.) Can a system of linear equations have exactly two solutions? A. True B. False 2.) The solution of a system of equations with no solution describes what kind of lines? a.) parallel b.) perpendicular c.) skew d.) coincidental

asked by Josh on December 7, 2013
38. ## medicine

how can i solve this?prepare 150ml of a 7.5%dextrose sol.you have D5%W and D10%W. how much of each sol. is needed? I assume the 7.5 dextrose is going to be on a w/w basis also. This is really simple, no algebra needed. Since 7.5 is halfway between 5 and

asked by rimple on December 2, 2006
39. ## math

Solve the system of equations: x - y - z = 2 x + 2y - 2z = 3 3x - 2y - 4z = 5 I know how to do the whole process, but sometimes I make careless errors that I never catch when I go over my work. This is the answer I worked out: x = 5 y = 1 z = 2 could

asked by Jennifer on May 5, 2008
40. ## maths

the mid-point of the line FG is (6,10). if the coordinates of G is (8,14) find the coordinates of F. There are a number of ways to solve this but I think the simplest is to use the definiton of midpoint. We know mdpt(FG) = 1/2(F+G) where FG is the segement

asked by Jen on September 7, 2006
41. ## algebra

i have 2 solve by elimination an i keep gettin fractions when the answer is (-3,-3) my teacher gave me the answer an problem but she wants me 2 work it out idk how i keep gettin fractions the problem is: -3x-4y=21 8x-5y=-9 please help

asked by angel on January 31, 2011
42. ## calculus

Solve the system by the method of your choice. Identify systems with no solutions and systems with infinitely many solutions, using set notation to express their solutions: (0 ,-5) (0 , 0) (-2 ,-1) (-2,-3)

asked by kelly on December 2, 2007
43. ## calculus

Solve the system by the method of your choice. Identify systems with no solutions and systems with infinitely many solutions, using set notation to express their solutions: x + y = 3 -2 + y = -3 (0 ,-5) (0 , 0) (-2 ,-1) (-2,-3)

asked by kelly on December 2, 2007
44. ## statistics

Researchers conducted a survey of parents of 66 kindergarten children. The parents were asked whether they played games with their children. The parents were divided into two groups: working class and middle class. The researchers wanted to know if there

asked by dd on August 23, 2013
45. ## Algebra

Use substitution to determine whether the ordered pair (–2, –3) is a solution of the equation x2 – y = 7. Show some work. Be sure to state your conclusion about whether the ordered pair is a solution or not.

asked by Jen on June 9, 2009
46. ## Algebra

Use substitution to determine whether the ordered pair (– 3, – 2) is a solution of the equation 5x + y2 = –11. Show some work. Be sure to state your conclusion about whether the ordered pair is a solution or not.

asked by Math Loser :( on October 29, 2010
47. ## Physics

A system undergoes a two-step process. In the first step, the internal energy of the system increases by 368 J when 144 J of work is done on the system. In the second step, the internal energy of the system increases by 24 J when 248 J of work is done on

asked by Sally on April 27, 2008
48. ## physics/chemistry(Thermodynamics)!!!!!helppppp!

In a certain chemical process,a lab technician supplies 254 j of heat to a system. At the same time,73 j of work are done on the system by iys surroundings.What is the increase in the internal energy of the system?

asked by duke on May 15, 2013
49. ## Geometry

Which ordered pair is the solution to the system of equations below? {3x-7y=-10 {5x-y=-6 A system of equations is shown below 2x+y=7 3x-2y=0 What is the solution to the system?

asked by Phillip on May 8, 2016
50. ## physics urgent!!!

A canoe of mass 70 kg with a paddler of mass 55 kg are in a river. If the river's current exerts a force of 15 N [E] while the paddler is paddling with an average force of 22 N [N38degreesW], find the acceleration of the canoe and paddler. Use both a

asked by Jess on April 7, 2011
51. ## calculus

Use Newton's method to solve the equation sec x = 4 in the interval x in (0, pi/2). In other words, use Newton's Method to compute arcsec(4). (You need to make a good initial guess for the root otherwise Newton's method will probably fail. Please justify

asked by Anonymous on April 13, 2011
52. ## Chem

I need help please! You have been given 40ml of a 0.6M solution of NaCl and 40ml of a 0.1M solution of KCl. You are also given as much diluent as you need. Show all your work and indicate how you would make 40ml of a single solution that contains 0.005M

asked by Jen on May 7, 2012
53. ## Algebra 1

What is an equation of a line perpendicular to the line with equation y = 1 - 3x a.y=-3x + 5 b. y=3x + 5 c.y=-1/3x + 5 d. y=1/3x + 5 To solve the linear system below, which substitution of unkowns is proper ? x + 4y= -6 5x - 3y = -16 a. substitute -4y-6

asked by Ley on April 22, 2013
54. ## Algebra

2. Tell whether the system has one solution infinitely many solutions or no solution. x=-7y+34 x+7y=32 a. one solution b. infinitely many solutions c. no solution*** can you please solve this thank you

asked by Leslie on December 12, 2016

Find the value fir each expression. Show your work. (13.28 - 7.8) divided by 4. I have the answer in the back of my book and when I try to work the problem out I keep getting the wrong answer. The answer is supposed to be 1.345 I can get the 1.34 but I get

56. ## Algebra

CEO Salaries In 2002, hourly wages for the top three CEOs (chief executive officers) of U.S. corporations were calculated based on their working 14 hours per day for 365 days. Together the three CEOs made \$44,000 per hour. The top CEO earned \$2,000 more

asked by genie on November 8, 2011
57. ## Chemistry

How many grams of magnesium sulfate would you need to make 0.500 L of a 10.0% M/V solution in water? Please show work.

asked by Margaret on February 18, 2013
58. ## Chemistry

What is the molarity of a potassium chloride solution that has a volumeof 400.0 mL and contains 85.0 g KCl? Please show work.

asked by MEGAN!!!! on April 30, 2010
59. ## Chemistry

Express the concentration of a commercial hydrogen peroxide solution, which is 3.0 (w/w), as a molarity. Show all work

asked by Amber on March 13, 2014
60. ## Chemistry

(Paper Chromatography) 1. What carrier solution might work well to separate newspaper inks? Why? 2. What carrier solution might work to separate different salts? Why? 3. What carrier solution might work to separate different fatty acids? Why? I really have

asked by Mikaela on January 26, 2017
61. ## Science

A repair shop tested two methods(a & B) of replacing a broken roller. In testing method A, these times in minutes were measured (5 trials), 2,4,9,3,2. In testing methods B, these times in minutes were measured (6 trials), 3,7,5,8,4,3. Use the 0.10

asked by Debra on December 19, 2011
62. ## Algebra

Solve. Show your work. A high school athletic department bought 40 soccer uniforms at a cost of \$3,000. After soccer season, they returned some of the uniforms but only received \$40 per uniform. What was the difference between what they paid for each

asked by anon on August 23, 2015
63. ## Quantitative analysis

I am trying to solve this question but I am lost can anyone help me pls Suppose your supervisor asks you to use the transportation method to rearrange the desks of everyone in the office. How would you do it? What other factors are important but will not

asked by amy on June 2, 2010
64. ## was not in class bio/ math

Preparing a Solution: A. Calculate the amount of methylene blue chloride (MW = 319.8 g/mol) needed to make 50 ml of a 10 mM stock solution. (Show calculations below) B. If you wanted to then dilute the solution from Part A to a final concentration of 0.1mM

asked by emily on September 20, 2016
65. ## Math

Which graph represents the solution of the given system? -2x+5y=-10 and -3x+5y=-20 I cannot show the graphs, but if anyone did the Systems of Equations and Inequalities Unit Test, in 7th grade Connexus, you might know what i'm talking about. My answer is

asked by Me on January 11, 2019
66. ## Math

Solve the following system of equations by graphing. If the system is inconsistent or the equations are dependent, say so 5x-2y=3 10x-4y=6 I know the equations are dependent but I am confused on what is the solution set I'm thinking its (10x-4y=6) but I'm

asked by Lataya on November 22, 2015
67. ## Math

Simplify the expressions in each pair. (2 marks each) (Show your work) i) (x^2-x-2)/(x+1),g(x)=(x-2) My work on simplifying the functions: (x-1)(x+2)/(1) (x-1)(x+2) ii) (x^2-x-12)/(x+3), g(x)=(x^2-6x+8)/(x-2) My work on simplifying the functions:

asked by Alex on January 10, 2015
68. ## chemistry

Assume that it is necessary to determine the [FE^3+ in a solution that may be 0.0001 to 0.0005 M range . Outline the spectrophotometric method that would accurately give the required data. Be spectific about the solutions that you would use. I know I have

asked by jxv on November 13, 2016
69. ## Chemistry

The Russian Mir space station used a chemical oxygen generator system to make oxygen for the crew. The system ignited a tube of solid lithium perchlorate (LiClO4) to make oxygen and lithium chloride (LiCl): LiClO4 (s) ---> 2O2 (g) + LiCl (s) If you have

asked by O on March 6, 2015
70. ## chemistry

The Russian Mir space station used a chemical oxygen generator system to make oxygen for the crew. The system ignited a tube of solid lithium perchlorate (LiClO4) to make oxygen and lithium chloride (LiCl): LiClO4 (s)  2O2 (g) + LiCl (s) If you have 500

asked by O on February 20, 2015
71. ## physics

A block and tackle system of 5 pulleys is used to raise a load of 50kg through a height of 20m the work done against friction is 200J.Calculate the work done by effort,the efficiency of the system and the effort applied.

asked by Mohamedy on June 25, 2016
72. ## College Math II

x/x – 1 - 3/x = 1/2 I am not sure how to solve this equation and show my work. My problem just says to solve the equation. Thanks.

asked by Lori on November 21, 2009
73. ## math

Pick a country of your choice that is experiencing population growth. Using the Library, web resources, and/or other materials to find the most recent population count of the country you have chosen and the population growth rate of that country. Use that

asked by Anonymous on September 17, 2008
74. ## Math

Convert 22 miles to yards. Use a proportion to solve. Show your work. Where do I start with this problem?

asked by Steve on March 26, 2015
75. ## Algebra

Use factoring and the zero-product property to solve the following problems: z(z - 1)(z + 3) = 0 x^2 - x - 10 = 2 4a^ - 11a + 6 = 0 9r^r - 30r + 21 = -4 Please show work. Thank you so much!

asked by Kathy on February 20, 2014
76. ## Math - Inverse Functions

Find the inverses of the following functions. y = 3(x - 1)^2, x >= 1 Work: x = 3(y - 1)^2 x = 3(y - 1)(y - 1) x = 3(y^2 - y - y + 1) x = 3y^2 - 6y + 3 And now what do I do!? Please explain and show me how to solve this inverse function! ... Thank you

asked by Anonymous on January 10, 2008
77. ## Math

Solve the equation: 4/3-x + 1/x+9 = 5/3-x Check all proposed solutions. Show work in solving and in checking.

asked by Crystal on July 7, 2009
78. ## Algebra

Write using set builder notation.Show work....Solve..-2(10x-9)-17x

asked by sherry on March 16, 2012
79. ## Maths

Solve the differential equation: d2y/dx2 - 2 dy/dx + y = 3sinhx The answer should be: y(x) = e^x (Ax+ B) + ( 3^8 )(2[x^2][e^x] - [e^-x] ) Can someone please show me how to work it out?

asked by Claire on November 30, 2009
80. ## algebra

Solve the following inequality and write your answer using interval notation . Please show all your work 10^3 + 6x^2 - 90x - 54 < 0

asked by anon on December 10, 2011
81. ## math

solve the inequality, write answer using interval notation pleas show the work 50/x+4+1

asked by mz tee on November 11, 2011
82. ## Algebra 2

Solve the equation. Round your answers to four decimal places. Show all of your work! a. 54x = 90

asked by denise on April 30, 2014
83. ## pre calculus

Solve the exponential equation Express you solutions in exact form only Please show your work e^2x - 9e^x - 20 = 2

asked by anon on December 20, 2011
84. ## Math

I was having trouble solving these equations: 7a+10=2a 11x=24+8x 9g-14=2g m-18=3m. I have to show my work and solve the answer to get the variable. Thank you!

asked by Karissa on April 3, 2018
85. ## algebra II

Solve the quadratic equation 12x^2 + 36a^2= 43ax by factorization Show your work

86. ## Math

3. Factor completely and solve. Check your solutions. Show all work. 6x^3 – 15x^2 – 36x = 0

asked by Anonymous on November 1, 2012
87. ## college algebra

Solve the exponential equation. Express your solutions in exact form only. Please show all of your work. 3^x-70*3^-x=9

asked by Sunny on January 4, 2012
88. ## Math

Use inverse operations to solve the equation, and show your work: 19 = h / 3 - 8 Please help ! This is the last question on my quiz, and I've been stuck on it for a while..

asked by Vixen - Connexus on October 26, 2018
89. ## algrebra

Solve by applying the quadratic Formula: all radicals should be simplified as far as possible. Show your work. a^2 -12a + 35 =0

asked by dan on April 25, 2010
90. ## geometry

what do I do to solve this problem? I don't know how to work it out, so could somone show me hoe to work it out. Please help! the lenght of a rectangular playing field is 5 ft less than twice its width.the perimeter is 230 ft,so what is the lenght and

asked by keshia on March 21, 2007
91. ## MATH

se a graphing calculator or Excel to find the solution of the system of equations. (If the system is dependent, enter DEPENDENT. If there is no solution, enter NO SOLUTION.) 5x + 3y = 2 3x + 7y = −4

asked by RICH on March 2, 2017
92. ## 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
93. ## Intermediate 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. y = x + 2, 3y − 2x = 4

asked by Donna on November 11, 2010
94. ## Math

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. 6x − 2y = 2, 9x − 3y = 1

asked by Anonymous on August 5, 2011
95. ## Intermediate 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 + n = 1

asked by Donna on November 11, 2010
96. ## 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
97. ## 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
98. ## Math

asked by ALLISON on September 23, 2011
99. ## 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
100. ## 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