# 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 8
1. ## Math

I been stuck on this assignment since yesterday and I need some to help explain this to me and provide steps so I can come to the conclusion myself, thank you! For problems 1-4 solve the given system of equations using either substitution or elimination.

asked by Badatmath on April 23, 2019
2. ## Math- Algebra

hi wat method would i use and how would i solve this system of equations x^2+xy=3 3x^2+2xy-2y^2=7 In your first equation, solve for y... you should have xy= -x^2+3... divide this by x... so y = x^2+3/x plug what you solved for y into your second equation

asked by Anonymous on May 21, 2007
3. ## pre calculus

Create systems of equations in two variables that have (a) no solution, (b) one distinct solution, and (c) infinite solutions. Show that each system has the indicated number of solutions by using a graph or solving the system.

asked by Anonymous on November 29, 2016
4. ## Algebra 2

1.What is the vertex from the equation? Y=x^2+12x=4 (Please show your work to show me the steps to get to the right answer.) 2. Use the quadratic formula to solve the equation. x^2-7x-6=0 (Please show your work to show me the steps to get to the right

asked by Sam on November 27, 2018
5. ## Linear algebra

Show that the origin is the only equilibrium point of the system? X=ax+by Y=cx+dy Wherea,b,c and d are constants, with ad-bc not aqual to 0(zero) Please show me how to do this problem Please show me the work

asked by Fatima on October 11, 2012
6. ## Algebra 2345678!!

Solve the system of equations using the Addition method. 2a + 3b = -1 3a + 5b = -2 The addition method tells you to find common multiples of a coefficient, then add the equations together to eliminate a variable. If you multiply the first equation by 3 and

asked by Margie on October 14, 2006
7. ## Math

1. A colony of bacteria grows exponentially according to the function where N is measured in grams and t is measured in days. N(t)=100e^0.045t You may use graphical method or algebraic method. Please show work if algebraic or show the graph if graphical

asked by Star on April 26, 2012
8. ## Chemistry

What is the pH of a solution that has a concentration of hydronium ions that is 4.7 × 10-4 molar H3O+? Show, or explain, the work used to solve this problem.

asked by Johnny on June 13, 2011
9. ## Chemistry

What is the pH of a solution that has a concentration of hydronium ions that is 1.8 × 10-4 molar H3O+? Show, or explain, the work used to solve this problem.

asked by Shanetra on April 15, 2014
10. ## calculus

The ellipse x^2+3y^3=13, has two points when x+-1 . Find the slope of the ellipse at both these points. 2. Thoroughly explain the method you used to find the slope in part 1. What are the strengths and weaknesses of the method you used? 3. Explain whether

asked by erika on January 3, 2013
11. ## math

two systems of equations are given below for each system, choose the best description of it solution. 1) the system has no solution 2) the system has a unique solution 3) the system has a infinitity many solutions. they must satisfy the following equation

asked by Anonymous on March 6, 2013
12. ## Algebra

The perimiter of a lot is 190 meters. The width is one-fourth of the length. Find the dimensions. Here's my system of equations: 2w + 2L = 190 1/4L = w What would I do from here? I prefer the elimination method. Would I multiply the second equation by 4?

asked by Willow on February 23, 2009
13. ## math

Estimate using any method. Show how you estimated. Then calculate the exact answer. Show your calculation work: 824 ÷ 6

asked by racheal on February 11, 2010
14. ## Engineering

For what values of (¢ belongs to R) the following system of equations has (1)no solution (2)a unique solution (3)infinitely many solutions? (5-¢)x+4y+2z=4 4x+(5-¢)y+2z=4 2x+2y+(2-¢)z=2 2) Consider three planes in R3. List all possibilities of their

asked by Edward on August 2, 2015
15. ## 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=A then show that A∩B=Ø

asked by Akashdeep Singh on July 4, 2010
16. ## Algebra

How do I solve for the elimination method: 5x + 3y= -7 and 7x - 2y =13 (step 1); 10x + 6y =-14 and 21x -6y = 39 ( step 2), 31x/31= 25/31, x= 25/31 (step 4). But after that I get lost. Can somebody help me out please.

asked by A.W. on March 6, 2009
17. ## Algebra 1

Solve each system using substitution. tell whether the system has one solution, infinitely many solutions, or no Solution. 1.) y=2x -1 2x +2y= 22

asked by Lindsey on March 9, 2015
18. ## help with math!!!!

Solve each system using substitution. Tell whether the system has one solution, infinitely many solutions, or no solution. 13. -x + y = -13 3x - 1 = 19 15. 1/3y= 7/3 x + 5/3 x - 3y = 5 17. 3x + y = -13 -2x + 5y = -54

asked by Hannah on March 12, 2014
19. ## algebra

Which of the following ordered pairs is included in the solution set of the system, y < 2 - 2x and y > 2x -3? (4, 0) (0, 0) No Solution (3, 4) 2. Choose all correct answers. Which of the following are solutions of the system? x < 3 and x + y < 5 (2, 2) (4,

asked by Andrean on May 4, 2014
20. ## Algebra help/ look over please

Can you please look over these and let me know if they are right? 1/4(5x-1/2)-5/3

asked by Lisa on October 1, 2009
21. ## Algebra

Just wondering if I did this correctly step by step. If not corrections are mostly appreciated! Solve the inequality and write the solution set in interval notation. Show work/explanation. (x+8)/(x-1) >= 0 8+x/x-1=1+9/x-1 9/x-1>=-1 x-1/9 < -1 x-1< -9 x0

asked by Tammie on July 25, 2009
22. ## Calculus - Volume by Integration

Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the y-axis: y=(x-2)^3-2, x=0, y=25 (a)solve by either the disk or washer method (b)solve by the shell method (c)state which method is easiest to

asked by Nicole on November 24, 2013
23. ## College Algebra

Solve the system of equations. Then classify the system. 7x-7y= -42 -7y-7x=42 What is the solution of the system? Is the system inconsistent or consistent? Is the equations dependent or independent?

24. ## Algebra

I need help with these two problems. I need to have all of the steps shown for full credit and I get lost along the way. 6x - 2y = 10 4x + 3y = 12 solve the system by elimination. solve inequality -2(2x-6)-4x>or equal to 3x-10 + 9 It's at this point in our

asked by aria on June 9, 2011
25. ## Algebra Multiple choice revised!! HELP

I have a few questions I need help with! Please explain if my answer was not right how you got to it. I got 1.) B 2.) A 3.) C 1. Solve the system by triangularizing the augmented matrix and using back substitution. If the system is linearly dependent, give

asked by Kris on March 28, 2013
26. ## compound inequality

solve the compound inequalities show all math work arriving at the solution display a simple line graph 1-x>-3 or 5x-1>19

asked by Anonymous on March 6, 2013
27. ## algebra2

solve the systems of equation: First : 4x-2y = 2 Second: y = -4x-7 Should i solve by using substitution, elimination or multiply then use elimination? Try adding them. Add up the left sides and the right sides (after rearranging the second equation) the x

asked by ann on July 26, 2007
28. ## Algebra

A rectangular garden is 54 feet longer than it is wider. Its perimeter is 292 feet. Write a system of linear equations whose solution gives the width and length of the garden. Use the substitution method to solve and check your answer.

asked by Tracy on July 1, 2017
29. ## algebra

Using the equation below as a model, fill in numbers in the place of a and b to create a rational equation that has an extraneous solution. x+a/ax=b/x Part 1. Show all work to solve for x in the equation and check the solution. Part 2. Explain how to

asked by rocky on June 9, 2016
30. ## Intermediate Algebra

Solve the system of equations by graphing. Then classify the system. f(x)=x+1 g(x)=-8x+10 What is the solution of the system? a)The solution is___? b)There are infinitely many solutions c)There is no solution Is the system consistent or inconsistent?

asked by Student5 on February 16, 2014
31. ## Intermediate Algebra

Solve the system of equations by graphing. Then classify the system. y=-x-13 5x-4y=-20 What is the solution of the system? a)The solution is___? b)There are infinitely many solutions c)There is no solution Is the system consistent or inconsistent?

asked by Student5 on February 16, 2014
32. ## math

Please show me how to solve using elimination: It takes a florist 3 h 15 min to make 3 small centerpieces and 3 large centerpieces. It takes 5 h 20 min to make 4 small center pieces and 7 large centerpieces. How long does it take to make each small

asked by Jane on December 28, 2011
33. ## college algebra

write the expression as a single logarithm 1. In(x/x*2)+In(x+2/x)-In(x^2-4) solve the following logarithmic equation. 2. log_9(x-2)+log_9(x+1)=2 what is the exact solution? What is the decimal approximation for the solution when rounded three decimal

34. ## math

Review example 2 How does the author determine what the? Example 2. Translate. The first row of the table and the fourth sentence of the problem tell us that a total of 63 pupae was received. Thus we have one equation: p+q=63 Since each pupa of morpho

asked by micheal on June 16, 2009
35. ## Math,correction

direction state : solve each system by addition. if a unique solution does not exist, state whether the system is consistent or dependent. NOw the problem looks like this: 2x+3y=1 5x+3y=16 the answer that I got was this: for variable x = 5 y = -3 which is

asked by jasmine20 on February 7, 2007
36. ## math

you have an unlimited supply of 5% saline solution and 8% saline solution. How much of each type would you have to use to create 60 ounces of 7% saline solution? Write and solve a system of equations to model and solve this problem.

asked by sahar on November 8, 2012
37. ## mathematics

Solve the following differential equation: (1 + x)*(dy/dx) = y where y is a funtion of X solve by the following by: A)series expansion B) elemantary method please show working

asked by ryan on November 30, 2011
38. ## maths

Solve the following differential equation: (1 + x)*(dy/dx) = y where y is a funtion of X solve by the following: A)series expansion B) elemantary method please show working

asked by ryan on November 30, 2011
39. ## maths

Solve the following differential equation: (1 + x)*(dy/dx) = y where y is a funtion of X solve by the following: A)series expansion B) elemantary method please show working

asked by Rikki on November 29, 2011
40. ## Math

Evaluate the expression for the given value of the variable. Show your work. [-4b-8]+[-1-b^2]+2b^3;b=-2 Solve the equation. Check for extraneous solutions. 9[9-8x]=2x+3. Show your work. I really need help with both of these problems.

asked by Bethany on September 18, 2017
41. ## Quick math help

Can someone check my answers on these? Thank you!! Solve each system using addition or subtraction. 1. x+y=8 x-y=4 For the solution I got (6,3) 2. x-3y=7 x+2y=2 For the solution I got (4,-1) 3. 5s+2t=6 9s+2t=22 For the solution I got (-4,13) 4. 2x+3y=13

asked by Anonymous on January 22, 2014
42. ## Math help

Can someone check my answers on these? Thank you!! Solve each system using addition or subtraction. 1. x+y=8 x-y=4 For the solution I got (6,3) 2. x-3y=7 x+2y=2 For the solution I got (4,-1) 3. 5s+2t=6 9s+2t=22 For the solution I got (-4,13) 4. 2x+3y=13

asked by Anonymous on January 23, 2014
43. ## Trig

Use a graphical method to find a solution to the following system of equations in the interval –1 ≤ x ≤ 5: y = x2 – 4x + 2 y = x + 2 The solution set to this system of equations in the interval –1 ≤ x ≤ 5 is {} {(2, 0)} {(0, 2), (5, 7)} {(2,

asked by Kiki on January 24, 2014
44. ## prealgebra

can you please help me and help me solve this and show work: Identify the percent of change as an increase or a decrease. Then find the percent of change. #1.) Original:45 New:30 Please help i don't understand how to solve and show work

asked by vick on February 27, 2012
45. ## algebra

Elimination method or substitution method. 1. 3/5x = 1/2y + 11 2. 3x + 8y + 13

asked by jen on December 14, 2016
46. ## Algebra (really need help)

Please lead me in the right direction. I am so confused and I have been working on this one problem for an hour. I have the answer, but I want to know how to get to it. The answer is (1,1,0) Solve the system by elimination. -2x+2y+3z=0; -2x-y+z=-3;

asked by Olivia N J on October 11, 2016
47. ## Math

Please lead me in the right direction. I am so confused and I have been working on this one problem for an hour. I have the answer, but I want to know how to get to it. The answer is (1,1,0) Solve the system by elimination. -2x+2y+3z=0; -2x-y+z=-3;

asked by Olivia N J on October 12, 2016
48. ## math

How do I solve the equations using the elimination method: .3x-.2y=4 and .4x +.3y= 49/23 Normally I would multiply the decimals by 10 to make them whole numbers, but that fraction is really throwing me off. What do I multiply to eliminate that fraction?

asked by bob on March 14, 2010
49. ## algebra

Can someone help me figure this out please? when you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent? thank you anyone

asked by don on March 18, 2012
50. ## calculus

When using the substitution method to solve a nonlinear system of equations, you should first see if you can _____ one variable in one of the equations in the system.

asked by heaven on January 28, 2010
51. ## Math

How do I solve this question? "Rory Gilmore earns \$20 per hour during the week and \$30 per hour for overtime on the weekends. One week Rory earned a total of \$650. She worked 5 times as many hours during the week as she did on the weekend. Write and solve

asked by Max on February 19, 2011
52. ## math

Here are a few problems I need solving Make sure to show a check for the solution and write the solution in set notation like {x|x>5}: Solve for y -7y-14>42 Solve for x -2(4x+5) < 2x-20

asked by Anonymous on September 22, 2010
53. ## Math

Can someone please help with this problem? Solve by the elimination method. 7r-9s= -58 9r+7s=74 I know that I need to multiply the first equation by 9 and the second equation by 7. The equations look like this: 63r-81s= -522 63r+49s=518 After this I get

asked by B.B. on April 17, 2010
54. ## algebra

The sum of two numbers is 82. Their difference is 24. Choose the system of equations that describes this situation. Solve by elimination to find the two numbers.

asked by Laura on December 21, 2012
55. ## 0303 math

Solve the system by the substitution method y=-2x-4 5x-2y=-1

asked by Tammy on November 18, 2010
56. ## algebra- help needed fast

solve the system by addition method 7x^2+y^2=49 7x^2-y^2=49

asked by Anonymous-2 on February 26, 2009
57. ## Algebra 2

Solve the system by the substitution method. 5x+7y=-18 y=5x-14

asked by saRa on November 4, 2009
58. ## college

solve the system by the substitution method x=8-4y 3x=5y=3

asked by Monica on February 11, 2010
59. ## Math 208

Solve each system by the substitution method. x+3y=2 -x+y=1

asked by Jodie on January 6, 2011
60. ## Math

Solve the system by using the substitution method. y= 3/4x - 4 -x + 2y= -6

asked by Neil on October 2, 2012
61. ## algebra

Solve the given system by the substitution method. 2x+y=6, 5x-2y=6

asked by angela on July 14, 2013
62. ## Math

Use the echelon method to solve the system: x + 3y + 4z = 14 2x – 3y +2z = 10 3x – 9y + z = 9

asked by Sally on June 4, 2010
63. ## Algebra Help!!

Solve the given system by the substitution method. 3x + y = 17 5x -2y = 10

asked by slomo on January 11, 2015
64. ## algebra-need quick

solve the system by addition method 7x^2+y^2=49 7x^2-y^2=49

asked by adam on February 25, 2009
65. ## Math

Use the echelon method to solve the following system: x/5+3y=31 2x-y/5=8

asked by Ashley on December 2, 2010
66. ## math

solve the system 3x-6y=5 and 2y=4x-6 using substitution method.

asked by agnes on January 23, 2011
67. ## algebra 2

Solve the system by the substitution method 5x+7y=-18 y=5x-14

asked by saRa on November 8, 2009
68. ## Math

Solve the system by the addition method. −5x+7y=4 4x−y=−17

asked by Gabby on October 30, 2016
69. ## Algebra 2

Solve the system using any algebraic method. 22.)2x-5y=4 23.)5x+7y=12 24.)3x-4y=6 3x+4y=9 3x-2y=8 4x+7y=1 Thanks!

asked by Jennifer on February 17, 2009
70. ## Math

Use the echelon method to solve the following system. x/5+3y =31 2x-y/5=8

asked by Star on November 24, 2010
71. ## algebra

Solve the given system by the substitution method. 3x + y = 17 5x -2y = 10

asked by Anonymous on January 13, 2015
72. ## algebra

Solve the following system using the substitution method: 3x + y = -3 y = 2x + 7

asked by hunter on July 3, 2013
73. ## algebra

Solve the following system using the substitution method: 6x - 2y = -4 y = 3x + 2

asked by hunter on July 3, 2013
74. ## math

Solve the following system using the substitution method: 2x + 4y = 5 x = -2y + 6

asked by hunter on July 3, 2013
75. ## Math

How would you solve each system by the substitution method? 1. Y=6x-5 Y=-x+9

asked by Anonymous on January 29, 2014
76. ## math

Solve the following system using the substitution method: y = 3x - 9 y = -x - 1

asked by hunter on July 3, 2013
77. ## algebra

Use the method of substitution to solve the system. xy=1 4x-y+3=0

asked by tara on October 28, 2010
78. ## Science

An iodoalkane A, with a molecular mass of 198, contains 30.3% carbon and 5.6% hydrogen by mass. It reacts with aqueous sodium hydroxide solution to give an alcohol which can be oxidised and with ethanolic potassium hydroxide solution to give two alkenes,

asked by Fasi on April 19, 2015
79. ## Algebra 1a

Solve by the substitution method. 5x + 8y=0 x=2 2y Type ordered pair if there is a solution, or indicate no solution

asked by Michelle F on May 26, 2010
80. ## Calculus AP - Volume of Revolution

Hi. I have a few calculus problems that I have to do using the washers and shell method to find out what the volume of the graph rotated is. I'll post one question at a time with my work. The problem is, I should be getting the same answer for the problem

asked by Kira on March 5, 2007
81. ## help math ahhhh

For questions 9–10, solve each system by elimination. 9. 5x + 4y = 1 3x – 4y = 7 (1 point) (–1, –1) (1, –1) (1, 1) 10. x + 2y = 5 3x + y = 10 (1 point) (3, –1) (1, 3) (3, 1)

asked by tiffany on January 20, 2011
82. ## algebra

solve the system using elimination 2x-5y=8 x-3y=-1 please explian step by step

asked by sarah on September 28, 2015
83. ## Algebra Multiple choice!!! Help

1.) Find the values of a, b, and c that will make the statement true. [5 a -2] [5 102] [3 4 –b] = [-3 -4 3] [2c 5 9] [-2 5 9] a.) 8R1-R2--> =R2 b.) -8R1-R2 -> =R2 c.) –8R1 +R2 -> =R2 d.) 8R1-R2 -> =R2 2.) Solve the system by triangularizing the

asked by Kris on March 28, 2013

I need help with these! I got B for 1. C for 2. and D for 3. Thanks for the help! 1.) Find the values of a, b, and c that will make the statement true. [5 a -2] [5 102] [3 4 –b] = [-3 -4 3] [2c 5 9] [-2 5 9] a.) 8R1-R2--> =R2 b.) -8R1-R2 -> =R2 c.)

asked by Becca on March 28, 2013
85. ## Algebra Multiple Choice help!!

I need help with these! I got B for 1. C for 2. and D for 3. Thanks for the help! 1.) Find the values of a, b, and c that will make the statement true. [5 a -2] [5 102] [3 4 –b] = [-3 -4 3] [2c 5 9] [-2 5 9] a.) 8R1-R2--> =R2 b.) -8R1-R2 -> =R2 c.)

asked by Kris on March 28, 2013
86. ## math(am i right)

determine whether (-5,1) is a solution of 9x-9y= -3 I said no am i correct? solve by elimination mehtod. 2x+3y=4, 4x+6y=8 type as ordered pair, type N for no solution, I for many. I chose I am I correct?

asked by scooby9132002 on July 4, 2009
87. ## 5th grade math

circle the best estimate for each problem. then solve. 52.2*39.7=_____ A.2,00 B.20,000 C.200,000 Solution:_______________________. 148.3*232.51=____ A. 3,000 B.30,000 C.300,000 Solution ________________. please! show me work too so, i can practic for this

asked by pat on October 27, 2010
88. ## Math

A does 20% less work than B .If a complete a piece of work in 7& 1/2 hours then B can do it in options- 5,5&1/2,6,6&1/2 plz solve without using x and y method

asked by Apoorv on April 27, 2011
89. ## To Helper

I had a problem to solve, and I don't get how to make equations from this problem. Mrs. Chans math class contributed 2 dollars and \$1 coins to an earthquake relief fund. the number of \$1 coins contributed was 8 less than 5 times the number of \$2 coins

asked by Mathew on January 13, 2011
90. ## Algebra

Write a detailed solution to the system x 1 3y # 9 y # 22x 1 6, where x \$ 0 and y \$ 0. Graph the system to show all possible solutions.

asked by Tonya on February 22, 2015
91. ## algebra

when you solve a system of equations by the substitution method, how do you determine whether the system of equations is dependent?

asked by Stephanie on October 28, 2010
92. ## algebra

Can someone please help. When you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent? Thanks

asked by algebra need help on March 1, 2012
93. ## algebra

When you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent?

asked by algebra on March 21, 2012
94. ## Calculus

Use the function f to solve the following: a) Local minima, local maxima, and stationary points if any. Show work. b)Intervals of upward concavity and downward concavity if any. Show work. c) Inflection points if any. Show work. f(x)=2x+1/x-2 Please, don't

asked by Alice on March 29, 2016
95. ## Algebra

Using the substitution method, what is the value of a in the solution to the system of equations below? a=3b+7 4a+9b=70

asked by Angie on March 31, 2013
96. ## Math

Here is the problem: Christopher orders a three topping pizza for \$15.25, and a 5 topping pizza for \$17.75. Write and solve a system of linear equations to find the price of a plain cheese pizza (no toppings) and the cost of each topping. I used the method

asked by Kathy on January 27, 2014
97. ## algebra

solve the system of equations using the substitution method 8x - 9 = y y - 8x = -4

asked by Anonymous on January 13, 2015
98. ## algebra

solve the system of equations using the substitution method 8x - 9 = y, y - 8x = 4

asked by Anonymous on January 13, 2015
99. ## Algebra

Use the substitution method to solve the linear system. 1/8p+3/4q=7 3/2p-q=4 Thanks.

asked by Emma on January 6, 2013
100. ## Math

Solve each system using the method of your choice. 1. 7x+2y=17 2. 6x-5y=-9 3. y=4x-8 4. y=2x+10 5. 3x-6y=30 6. y=-6x+34 7. 3x+y=5 8. 15x+5y=2 9. 2m=-4n-4 10. 3m+5n=-3 11. 5x+y=0 12. 5x+2y=30 Thank you. (:

asked by Melanie on February 11, 2014