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 46
1. Algebra

Solve the system.4x+3y=11 and3x -2y=4 x= -2 and y = -1 678/987

asked by Linda on June 3, 2007
2. Algebra 1

Solve the system by addition 10x+3y=4 -20x-6y=-8

asked by Melessa on March 10, 2013
3. math

6x−10y=730 7x-9=y Solve the system by substitution.

asked by angel on October 21, 2018

Solve the following system of linear inequalities by graphing. 3x – y < 2 x + y > 2

asked by T.T on January 25, 2008
5. math

asked by rachel on March 29, 2010
6. finite math

solve the system of equation for all variables using a matix x-y-z=1 2x-3y+z=10 x+y-2z=0

asked by crystal on June 26, 2009
7. precalculus

solve each system of equations 6x^2+3y^2-111x-y+128=0 3x-y=1

asked by Anonymous on June 20, 2019
8. finitie math

solve the system of equation for all variables using a matrix 2x+y+z=6 -3x-4y+2z=4 x=y-z=-2

asked by crystal on June 26, 2009
9. math

solve my system of equation with full steps 3x+4y=29 2x–5y=-19

asked by kate on July 24, 2013
10. Math

Solve the following system of equations using substitution. What is the value of y? 2x+3y=105 x+2y=65 a. 15 b. 25 c. 40*** d. 65

asked by Kaai97 on January 11, 2016
11. math

Solve the following linear system of equations. 3x-2y+z=2 x-y+z=2 5x+10y-5Z=10

asked by Nick on December 12, 2010
12. algebra

How do i use substitution to solve each system? y= 0.8x + 7.2 20x + 32y=48

asked by Anonymous on September 2, 2009
13. Math

Can someone explain to me how to do this please!!! Solve the system of equations graphically: x+y>3 x-y

asked by Anonymous on May 15, 2008
14. precalculus

Write as a matrix equation and solve each system. 2x + 5y - 2z = 23 3x - 4y + 2z = 5 5x - 6y - 4z = 3 ----------------------------- 6x - 6y - 2z = 28 x - 2y = 4 -2x + 5y = -9

asked by Anonymous on June 23, 2019
15. Algebra 1 Answer Check (Reiny)

Factor each trinomial. 1. x^2 + 6x + 5 A: (x + 1)(x +5) 2. x^2 - 7x - 12 A: (x - 3)(x - 4) Solve each system by substitution. 3. 2x - y = 1; x - y = -2 A: (3, 5)

asked by Anonymous on March 7, 2014
16. Math

Solve the following system of linear inequalities by graphing. 3x – y < 2 x + y > 2

asked by Need help on December 16, 2007
17. math

Solve this system of linear equations by graphing 2x-y=4 , 2x-y=6

asked by Anonymous on January 22, 2008

asked by Olivia N J on October 13, 2016
19. Algebra 1

solve each system by substitution. check your answers 4y +3 = 3y +x and 2x +4y =18

asked by Lindsey on February 24, 2015
20. Math

Can someone tell me what it means to solve the system of a linear equation?

asked by Marinda on September 15, 2007
21. Algebra

Solve the system by graphing. x+y=−2 y=13x+2 Thanks jiskha,com :)

asked by Norman on January 1, 2016
22. algebra

solve the following system of equations? y=3xsquarerd+4x+1 y=xsquared-7x-4

asked by Anonymous on February 1, 2012
23. System of equation

solve system of equations graphically and check 2x - y = 5 3x + 2y = 4

asked by Genevieve on September 6, 2010
24. Algebra 2

asked by Olivia N J on October 13, 2016
25. Math - PreCalc (12th Grade)

Use the inverse matrix to solve this system of equations: 4x+3y=7.5 7x+9z=14 4y-z=8.3 4,3,0 7,0,9 0,4,-1

asked by Shawna on March 21, 2014
26. math

how do you solve this using substitution of system equations here's the problem -4=x-2y and -x+2=-y

asked by Anonymous on February 16, 2011
27. math/algebra

how do I solve system of linear inequalities by graphing x-y6.

asked by rex on September 16, 2007
28. Math

Solve the following system of equations using substitution. What is the value of Y? 2x+3y=105 x+2y=65 A. 15 B. 25 C. 40 D. 65

asked by Cami on January 20, 2016
29. algebra 2

solve each system by substitution 1. y=xt1 2x+y=7 2. x=y-2 3x-y=6 3. y=2xt3 5x-y=-3

asked by raul on January 8, 2013
30. math

Solve the following systems of equations x+8y=4 (1) x=9-8y= (2) what is the solotion to the system

asked by Taffany on June 6, 2010
31. algebra 2

Solve the given system of linear inequalities by graphing: x+y>4 x-y

asked by saRa on November 4, 2009
32. math

solve the following system of the equations using matrices 10x-5y=4 7x+y=10

asked by Keya on August 11, 2014
33. Chemistry

Hi, I'm really having trouble this this chemistry problem. I have the answers; however I don't have extensive knowledge about titrations and I'm struggling with working it out. If anyone could suggest how to work this out (or even where to start) that

asked by Stein on August 26, 2007
34. Algebra

Write the equation of the line passing through the given point with the indicated slope. Give your results in slope-intercept form. Point: (0,5) Slope:m=3/5. Show work Well, youknow the form is y= mx+b you are given m. You are given a point (0,5) Put that

asked by Linda on May 20, 2007
35. algebra

solve the equation(enter solution from smallest to largest. if there no solution enter none) 4x^2=15x+4

asked by missfubu-c on October 28, 2012
36. math

(n-2)*180 =108n 180 n - 108 n = 360 72 n = 360 n = 5 drwls, I had totally misread the problem and thought it said (n-2)^180 =108n been working on it for almost an hour, trying Newton's method and all kinds of iteration. I really have to try to read the

asked by chris verwer on March 21, 2007
37. Math

We have an important chemsitry test due and I want to make sure that I do not mess up on my algebra. I am dealing with the integrated rate law, but my question is purely algebraically in nature. I hope, somebody can help me. 1) ln(A) = -kt+ln(B) solve for

asked by Yasemine on May 13, 2013
38. Math

5x+3y=-11, 7x-2y=19 solve by elimination. Sol'n: 5x+3y = -11 ---(1)x 2, 10x + 6y = -22 ----(1') 7x-2y = 19 ---(2)x 3, 21x - 6y = 57 ----(2') add 1' and 2' 31x = 55, divide by 31 on both side to obtain the value of x, x = 35/31 then find y: from (2)

asked by Katie Lee on September 15, 2011
39. Math calculus 2

A propane tank is in the shape generated by revolving the region enclosed by the right half of the graph of (4*x^2)+(64*y^2)=144 and the y-axis about the y-axis. If x and y are measured in meters find the depth of the propane in the tank when it is filled

asked by Anonymous on February 15, 2018

In basketball you score 2 points for a field goal and 1 point for a free throw. Suppose that you have scored at least 3 points in every game this season, and have a season high score of 15 points in one game. How many field goals and free throws could you

asked by annie on January 18, 2013

In basketball you score 2 points for a field goal and 1 point for a free throw. Suppose that you have scored at least 3 points in every game this season, and have a season high score of 15 points in one game. How many field goals and free throws could you

asked by annie on January 20, 2013

(2y-1)dy/dx=(3x^2+1) given that x=1 when y=2 plz show step thanks 2) (a)find the general solution of the equation (x-2)dy/dx+3y(x-1)/(x+1)=1 b)given the boundary condition y=5 when x=-1,find the particular solution of the condition given in (a) a little

asked by ... on January 1, 2017
43. chemistry

what is the advantage of using the indirect method over the direct method for calculating the enthalpy change of 2KHCO3 - K2CO3 + CO2 + H20

asked by stephanie on January 3, 2016
44. calc

find the volume of the solid generated by revolving around the x-axis: y=e^(x-8), y=0, x=0, x=10 So I know you can use the washer method, but the shell method can also be used and it should be better. The issue is I'm not certain how to actually do it. Any

asked by Anonymous on January 29, 2013
45. science

How does the hierarachical organization of organisms work within a system?

asked by Robert on March 20, 2013
46. government

How do the three branches work within the system of checks and balances?

asked by anonymous on October 8, 2014
47. Physics

if the power developed is 290 ft lb/s for 12.8s what is the work done on the system?

asked by Sheryl on June 23, 2013
48. Anthropology

why the kinship system work? Answer Because it help out the people

asked by jimmy on January 31, 2015
49. science

Read the statement and then apply it to the scenario. Statement In science, it is not possible to prove hypotheses right. This is not the fault of scientists and their experiments; the scientific method is only able to tell scientists if their hypotheses

asked by dianni on December 19, 2018
50. science

Read the statement and then apply it to the scenario. Statement In science, it is not possible to prove hypotheses right. This is not the fault of scientists and their experiments; the scientific method is only able to tell scientists if their hypotheses

asked by Bri on March 9, 2018
51. math,help!!!!

How do i do thois problem?Please help. Problem #1 solve the system by subtraction. 5x-3y=13 4x-3y=11 Subtract the lower equation's left and right terms from the upper equation's corresponding terms. The first step will get you this: x = 2 Now that you know

asked by jasmine20 on February 13, 2007
52. Chemistry

In the equation Q = mc(deltaT), I learned that Q means heat transfer. Is it the heat transfer from the system to the surroundings, i.e. the system loses/absorbs heat or is it from the surroundings to the system? A couple of places on the Internet say that

53. Physics

Show that the coefficient of surface tension T is given by T=rhPg/2 where P, h and r are density, height and radius of the system respectively.?

asked by King Sọlọmọn on June 12, 2019
54. engish (beowulf)

how does the battle between Beowulf and the dragon show the inequalities of the Anglo saxon class system?

asked by sue on October 11, 2010
55. Chemistry Help.......

Sulfuric Acid (H2SO4) is a strong acid, which dissociates when dissolved in water according to the following equation: H20SO4(aq)-> 2H+(aq) + SO4 2- (a) A 0.21g sample of sulfuric acid is dissolved completely in sufficiebt water to make 0.25litre of the

56. chemistry

Calculate the volume required for complete neutralization of 60.00mL of 0.1500 M KOH(aq). a) 0.1500M nitric acid, HNO3. The answer I got for this question is 0.06 using method c1v1=c2v2 but I want to show using unit analysis. Please help me know how to do

asked by tom on October 20, 2018
57. pre-calculus 11

abs x^2/2 -1 =x+3 solve algebraically so if I divide through by 2 i get x^2 -2= 2x+3 simplifying x^2-2x-5 =0 solve by quadratic formula to get =3.449 and -0.445 both of which are extraneous roots if I take negative then I get -x^2 +2=2x+6 simplify to x^2

asked by george on June 9, 2015

1. What is the solution to 89+k=-42? a. K = 131 b. K = 47 c. K = -47 d. K = -131** 2. What is the additive inverse of -7? a. -7 b. 7** c. -|-7| d. -(-(-7)) 3. What is the solution to y-7=-7? a. y=14 b. y=7 c. y=0** d. y=-7 4. What is the value of

asked by Lorea on September 3, 2015
59. math

Translate the problem into a pair of linear equations in two variables. Solve the equations using either elimination or substitution. State your answer for the specified variable. A student took out two loans totaling \$10,000 to help pay for college

asked by P.Smith on February 6, 2010

On Friday and Saturday, 618 people attended a car show. If the same number of people went each day,how many people attended the car show on Saturday? My answer is 1,236. Is my answer correct? If not please show me how to work this problem.

asked by stephon on April 8, 2014

1. It takes Dustin 2 hours to shovel the snow from his driveway and sidewalk. It takes his sister 3 hours to shovel the same area. How long will it take them to shovel the walk if they work together? A: Working together, Dustin and his sister can shovel

asked by Victoria on June 3, 2014
62. Math

use substitution method for solving x+y=4 (x+2)^2+(y-3)^2=5 I got the first part to solve it x +y =4 y=4-x the second part i got to (x+2)^2 + ((4-x)-3)^2=5 x^2 + 2x + 2 ((4-x)-3)^2 = 5 and that is all i could get that i knew was right but i don't know how

asked by Sarah on May 12, 2009
63. Math

Solve each of these systems using the substitution method. Make sure to check your answers ! 2x + 3y = -4 x - 2y = 5 Question 1 answers x = 1, y = -2 x = -1, y = 2 x = 1, y = 2 x = -2, y = -1

asked by Andrew on January 3, 2011
64. algebra

Solve the equation by a method of your choice: 6x2 + 5x + 1 = 0 If there are two solutions, separate the solutions by a comma.

asked by nikki on June 6, 2011
65. algebra

Im lost i don't know how to do this can someone show me step by step how to solve this For what value of c does the equation have one real root? Hint using the values of a and b found in the equation, solve D = 0 for c. Consider the quadratic expression

asked by toni on October 8, 2013
66. algebra

Im lost i don't know how to do this can someone show me step by step how to solve this For what value does c does the equation have one real root? Hint using the values of a and b found in the equation, solve D = 0 for c. Consider the quadratic expression

asked by toni on October 8, 2013
67. Algebra 1--Three Word Problems (Reiny or Kuai)

Can anyone thoroughly explain how to solve these problems as well as how to graph them? 1. Linda works at a pharmacy for \$15 an hour. She also baby-sits for \$10 an hour. Linda needs to earn at least \$90 per week, but she does not want to work more than 20

asked by Anonymous on January 17, 2014
68. Alegebra, math 116

1. Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city. a) The sales representative informs you that there are two floor plans still available, and that there are a total of 56

asked by Jess on November 22, 2009
69. math

You decide you will buy a stock only if it shows an overall increase over the next 30 days. The first 10 days, it has an average daily increase of \$0.30. The next10 days, it has an average daily decrease of \$0.45. The last 10 days, it has an average daily

asked by ss on August 23, 2018
70. Chemistry

I haven't calculus in a while. So can someone please help me with this, its for rates: log (base 1/4) 0.25 = m I know that m = 1, but how would I solve for it using the log method.

asked by Raj on March 11, 2008
71. Math

I have to solve a - 9 = 20 & b - 9 > 20. The first one would be a= 29 right?? I need help with the inequality also how is part a and part b similar situation with the solving method??? How are they different

asked by Becki! on December 18, 2018
72. Algebra 1

I have to get this last problem done it's for my project here's the problem: solve by completing the square method x 2- 12x =-11

asked by Bo on May 2, 2013
73. math

If 16

asked by Anonymousab on June 12, 2013
74. Math

use substitution method for solving x+y=4 (x+2)^2+(y-3)^2=5 I got the first part to solve it x +y =4 y=4-x the second part i got to (x+2)^2 + ((4-x)-3)^2=5 x^2 + 2x + 2 ((4-x)-3)^2 = 5 and that is all i could get that i knew was right but i don't know how

asked by Sarah on May 12, 2009
75. Chemistry

For the system, H2(g)+X2(g) 2HX(g) Kc=24.4 at 300K. A system was charged with 1 mole of H2 and 1 mole of I2 in a 3 liter container. The catalyst was introduced using a remote unit, and the system was allowed to come to equilibrium. How many moles of H2

asked by Anonymous on March 17, 2009
76. Algebra

An office manager reported that he spent \$350 on gifts for employees. He said that \$240 was spent on clothing with each man receiving a \$20 T-shirt and each woman receiving a \$40 sweatshirt. He said that \$110 was spent on desk accessories with each man

asked by katy on May 16, 2019
77. Applied Mathematics (Perturbation)

Solve these questions by using Algebraic Perturbation series method using this series U = U_o + e U_1+... 1. eU^3+U-2=0 2. eU^3+(U-2)=0 3. eU^4+U^3-2U^2_U+2=0 4. U^2-U-2+e/2(U^2+2U+3)=0 5. eU^4-U^2+3U-2=0 6. eU^4-U^3+3U-2=0 7. eU^4+U^2+2U-1=0 8.

78. Algebra 1

Solve by whatever method you would prefer. (Leave answers as improper fractions) 3x + 2y = -10 2x – 5y = 3 Can someone give step by step?

asked by Abi on December 19, 2017

Ten years ago, I started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted me to office manager. I manage two employees: Jack Snyder and Ruth Disselkoen. My office provides secretarial support

asked by Vickie White on March 30, 2009
80. Chemistry

What is the molarity of a solution of Mg(OH)2 if the solution contains 1.35 g in exactly 100 mL of solution??? A 15.0 mL solution of H2SO3 is neutralized by 12.0 mL of a standradized 1.00M NaOH solution. What is the concentration of the H2SO3

asked by Tasha on December 12, 2012
81. Chemistry

If 50.0 mL of a 1.00 M solution of CaCl2 (solution A) is mixed with 85.0 mL of pure water to produce solution B and then 42.5 mL of solution B is mixed with 52.0 mL of solution A to give solution C, what is the concentration of CL^-(aq) in the final

asked by John on April 29, 2018
82. Chemistry

Using your 0.0100M oxalate solution and only the equipment and supplies listed below, describe how to prepare a 0.00025M solution of oxalate. Note, you are not allowed to add volumes with pipettes. (example, if you want 20mLs, you can not use a 10mL + 10mL

asked by Jessica on June 17, 2013
83. chemistry

Using your 0.0100M oxalate solution and only the equipment and supplies listed below, describe how to prepare a 0.00025M solution of oxalate. Note, you are not allowed to add volumes with pipettes. (example, if you want 20mLs, you can not use a 10mL + 10mL

asked by Annie on June 17, 2013

For the past three months there seems to be an ever-growing problem at our company of DMD Medical Supplies: The quality of work has been poor; the morale of various employees has been brought down; and the workflow has been uneven amongst both teams and

asked by Shawna on February 2, 2012

For #1-4, write an equation of the line that passes through each pair of points. Show all of your work to receive full credits. 1.) (9, -2) and (4, 3) Answer: 9 = -1x + -2 2.) (3, 5) and (2, -2) Answer: 3 = 7x + 5 3.) (4, 3) and (2, 0) Answer: 4 = 2/3x + 3

asked by Sharpshooter on September 25, 2017
86. Physics

The work required to bend a steel beam with a spring constant of 10^6 n/m is 5 j. If it is treated like a perfect spring, what is the displacement of the beam? A. 3.2 mm b. .03 m C. 2.5m D. 0.026 m e. 0 Pls show work thank u!

asked by john on December 3, 2012
87. statistics/mean and standard deviation

find the mean and standard deviation in the following probability distribution x 1 2 3 p(x) 0.2 0.6 0.2 *i think that the mean is 2 but am lost after that when it comes to the standard deviation. please show work and calculations. the more i work with

88. Physics

Calculate the force of gravity on a spacecraft 19200 km (3 earth radii) above the Earth's surface if its mass is 1600 kg. I've done all the work but I can't seem to get the right answer, please show work and answer.

asked by Kyle on October 28, 2010
89. Math

Simplify the expressions in each pair. (2 marks each) (Show your work) (x^2-2x)/(x+1)x (x^2-1)/(x^2+x-6) My work on simplifying the expressions x(x-2)/x+1 x (x+1)(x-1)/(x+3)(x+2) If I've gone wrong please help me understand where I went wrong and help me

asked by Alex on January 10, 2015
90. Math

Simplify the expressions in each pair. (2 marks each) (Show your work) (x^2-2x)/(x+1)x (x^2-1)/(x^2+x-6) My work on simplifying the expressions x(x-2)/x+1 x (x+1)(x-1)/(x+3)(x+2) If I've gone wrong please help me understand where I went wrong and help me

asked by Alex on January 10, 2015
91. algebra

Twins Diana, and Riana are each 6 years older than their younger brother Kyle. Together, their three ages total 21 years. How old is kyle? Please show your work to help me understand how to work the problem

asked by Theresa on January 6, 2009
92. algebra2

10 points) Score 2. Allegra has a cell-phone plan that charges \$65 per month and \$0.10 for every minute that she uses the phone beyond what her plan allows. One month, she was billed \$73.40. a. Define a variable for the unknown. b. Write an equation to

asked by myira smith on December 9, 2014

I am having trouble, I have a question I think I got the answer because I kept multiplying and dividing, but I have to show my work but when i try, my answer is not the same. The question is A traffic light at one intersection changes every 28 seconds and

asked by Hailey on September 30, 2010
94. Physical Chemistry

A saturated solution of Na2SO4, with excess of the solid, is present at equilibrium with its vapor in a closed vessel. (a) How many phases and components are present? (b) What is the number of degrees of freedom o the system? Identify the independent

asked by Jessica on October 3, 2015
95. science

Listed below are six mixtures. Identify physical properties of the components that allow you to separate them. Then, explain the method you would use to separate the components. Mixture 1: Salt dissolved in water Physical Properties: Density Method of

asked by Hope on October 24, 2011
96. 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. In a basketball game, Will scored 26 points, consisting only of three-point shots

asked by star on August 26, 2010
97. Math

1. Is the equation true, false, or open? 5x+2=6x+11 a. Open; there is a variable b. True; the expressions are the same for all values of the variables c. False; the expressions are never the same 2. Which equation is an identity? a. 8-(5x+2)=-5x-6 b.

asked by Shaghayegh on October 12, 2015

The Candle Shop -Annual Inventory of candles. _______-________________________________ Jan 1 Beg Inventory 5,000 units @\$0.89 ---------------------------------------- Feb 15 Purchase 10,000 units @ \$0.69 ________________________________________ April

asked by Anonymous on November 9, 2007
99. college chemistry

A) In some regions of the southwest United States, the water is very hard. For example, in Las Cruces, New Mexico, the tap water contains about 560 ug of dissolved solids per milliliter. Reverse osmosis units are marketed in this area of soften water. A

asked by Stephanie on April 28, 2010
100. Augmented Matrix

Perform row operations on the augmented matrix as far as necessary to determine whether the system is independent, dependent, or inconsistent. DO ALL WORK BY HAND. x + 2y + 4z = 6 y + z = 1 x + 3y + 5z =10 If one subtracts the first equation from the last

asked by GetYourLeash on July 22, 2005