1. algebra

    solve by the substitution method: 8m+n=47 m-5n=52 thank you having trouble completing please show all work so I can learn better

    asked by Barbara on July 26, 2011
  2. Math - Algebra

    A. Solve the following quadratic equations. Make sure to show all your work. Do not use any method (e.g. factoring, completing the square, quadratic formula, graphing) more than twice. Use the graphing method at least once. 1. 3x+2 + 11x -20 =0 2. x2 + 3x

    asked by Angela Again! on January 9, 2007
  3. pre - CALCULUS

    Solve the system by the substitution method. Show your work. 2y - x = 5 x2 + y2 - 25 = 0

    asked by Ciara on April 14, 2015
  4. Pre - CALCULUS

    Solve the system by the substitution method. Show your work. 2y - x = 5 x2 + y2 - 25 = 0

    asked by Ciara on April 13, 2015
  5. Substitution Method-Plz help

    Use the Substitution method to solve the system of equations. x + y = -4 x - y = 2 solve for x in the second equation. x= y+2 Put that in for x in the first equation: x+y=-4 (y+2) + y = -4 solve for y. Then, x= y+2 i don't get it.How did you get that?What

    asked by Svetlana on October 17, 2006
  6. math

    Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 8y + 2x = 48 2x = 4y – 12

    asked by Taina on June 21, 2011
  7. Algebra

    Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 4x + 4y = -36 4x + 4y = 12

    asked by gina on July 6, 2011
  8. Algebra

    Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this: 4x + 4y = -36, 4x + 4y = 12

    asked by Tammy on July 1, 2011
  9. Algebra

    Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 4x + 4y = -36 4x + 4y = 12

    asked by toni on July 3, 2011
  10. algebra

    Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 4x + 4y = -36 4x + 4y = 12

    asked by tom on July 6, 2011
  11. algebra

    Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. x + 10y = 41 x + 9y = 37

    asked by Joel on February 22, 2011
  12. Algebra

    Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. x + 10y = 41 x + 9y = 37

    asked by Betty on February 22, 2011
  13. Intermediate Algebra

    Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. -3x + y = 4 x + 3y = 22 Here's what I came up with (where did I go wrong) -3x + y = 4 y = 4 - 3x -3x + (4-3x) = 4 -3x + 1x =

    asked by Jordyn on October 11, 2010
  14. Algebra PLEASE HELP!!

    What advantages does the method of substitution have over graphing for solving systems of equations? Choose the correct answer below. A. Graphing cannot be used to solve dependent or inconsistent systems due to the nature of the lines involved.

    asked by zwgz123 on December 15, 2017
  15. Pre-Calculus

    Solve the system by the substitution method. Show your work. 2y - x = 5 x2 + y2 - 25 = 0 I solved the problem but I got it wrong for some reason..can you solve it step by step?

    asked by Liz on June 2, 2016
  16. Algebra 1

    Okay. So I am completely lost with this... Any help would be great! 3. Solve the system using any method – graphing, substitution, or linear combination. Make sure to show your work. 2x + 5y= 8 x + 3y= 2

    asked by Miranda on January 11, 2013
  17. algebra

    Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 3x – 15y = -12 3x + 24y = -12

    asked by Linda on November 14, 2011
  18. algebra

    Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 18x + 6y = 78 12x + 54y = -48

    asked by Anonymous on February 21, 2012
  19. Linear Equations

    Can you please help solve this equation using the substitution method? I have tried and keep getting that X and Y = 7/2, but the answer in the book states no solution, inconsistent system. What am I doing wrong? Please help! Solve the systems of equations

    asked by Mia on March 2, 2010
  20. Algebra 1

    bobpursey, In this problem you helped me with earlier: Solve using any appropriate method. y = 2× - 5, y = ½× + 1 Substitution, substitute for y. 2×-5=½ × + 1 3/2 x=6 x=4 y= 2*4-5=3 How did you choose which method you were going to use between

    asked by slomo on January 3, 2015
  21. algebra 1

    use the substitution method to solve the linear system. 9x+6y=3 3x-7y=-26 please show me an example of how to do it.

    asked by aneme on February 13, 2008
  22. math

    Can someone please check my work? Solve using substitution method 1. 3x+2y=12 x=52-6y answer:-40.8 I am pretty sure that one is wrong. Solve using elimination method 2. 2r-7s=-31 7r+2s=24 answer: (230/53,-468/53) 3.3x+4y=3 6x+8y=6 answer: No answer.

    asked by deedee on January 6, 2009
  23. Algebra

    Solve: 3x-2y=10 2x+3y=-2 Graph: Substitution: Elimination: Show Your work! (I can'tfigure out how to graph it and when i used substitution and elimination it came out with two different anwsers. I got (13/3.5,19/10.5) for substitution, and ((0.2,-0.8) for

    asked by Darryl on January 17, 2011
  24. Algebra

    How do you solve an equation with a fraction like x^(2/3) +13=17. I don't think the quadratic formula would work for this method, and neither would completing the square. What should I do?

    asked by Leyla on November 24, 2009
  25. Algebra II

    Solve the given system by using a substitution method 9x-2y=3 3x-6=y If you could show the steps because I have 10 problems for homework and I just need an example Thanks

    asked by JessieLynn on February 4, 2011
  26. Math-Algebra

    Solve: 3x-2y=10 2x+3y=-2 Graph: Substitution: Elimination: Show Your work! (I can'tfigure out how to graph it and when i used substitution and elimination it came out with two different anwsers. I need help! and i need to be able to show my work!)

    asked by Darryl on January 17, 2011
  27. math

    solve by completing the square x^2-3x=4 please show work

    asked by timothy on December 9, 2012
  28. Algebra

    I was given this answers to a problems I solved but I do not understand what she means hope you can help. Before attempting to solve this quadratic equation, determine how many solutions there will be for this quadratic equation. Explain your reasoning.

    asked by Charly on June 2, 2011
  29. Algebra

    I was given this answers to a problems I solved but I do not understand what she means hope you can help. Before attempting to solve this quadratic equation, determine how many solutions there will be for this quadratic equation. Explain your reasoning.

    asked by Charly on June 2, 2011
  30. math

    solve each of the following equations by completing the square and show ur work x²-4x=32

    asked by Derek on September 7, 2008
  31. math

    solve each of the following equations by completing the square and show your work x² + 6x + 24=0

    asked by Derek on September 7, 2008
  32. Math

    17) solve this linear system using the method of substitution. 2y-x=-10 y= -3/2x-1 20) simplify then solve by substitution 2(x-4)+y=6 3x-2(y-3)=13 just need help with these 2.

    asked by Ma names Jeff on February 27, 2016
  33. algebra 1

    Solve each linear system by substitution method. x+2y=7 2x+4y=8 I'm getting stuck. Could some one explain the work out process and what the outcome means?

    asked by Chica on January 25, 2010
  34. precalculus

    can you check my work? Solve the system of equations at the right by the method of substitution. Verify your results by using a graphing utility. x^2+y^2-4x+6y-5=0, x+y+5=0 x=-y-5 (-y-5)^2+y^2-4(-y-5)^2+6y-5=0 y=√5-5, y=-5-√5 x+√5-5+5=0 x=-√5

    asked by Anonymous on December 14, 2016
  35. Algebra

    solve by substitution. Please show all work. -6x+5y=1 6x+4y=10

    asked by Braxston on August 14, 2014
  36. math ALGEBRA

    Solve by either the substitution method or the addition or subtraction method 2m=n-3 3m=2n-9 Just replace n with (2m + 3) in the second equation. Then solve for m. Once you know the value of m, use either of your equations, such as n = 2m+3, to get n.

    asked by DANIELLE on December 21, 2006
  37. Algebra

    using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 3x + 24y = 24 27x – 15y = -15

    asked by Miguel on March 23, 2011
  38. subsitution method

    Can some one show me how to use the Substitution method to solve the system of these equations. x + y = -4 x - y = 2 x + y = 10 y = x + 8 on the first set. Solve for either x or y in either equation, then put that value into the other equation. Example: x

    asked by mike on July 1, 2007
  39. Algebra

    Solve the system of equations using substitution. x + 4y = -5 3x - 8y = 45 When I tried to solve it, I got x=-17 and y=-3. When I plugged these into the first equation, it didn't work out at all. Could someone please show me the steps so I can see where I

    asked by Cassie on February 27, 2009
  40. College Math II

    Solve by any method. x(x + 1) = 12 I am not sure what method to use to show my work and figure out the answer. Can someone help me understand this problem. Thanks.

    asked by Lori on November 21, 2009
  41. math

    use the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this 3x + 24y = 24s,27x – 15y = -15 .

    asked by carol on May 2, 2011
  42. ALGEBRA 1!PLZ HELP!

    Use the Substitution method to solve the system of equations. y - 2x = -5 3y - x = 5 Solve the first equation for y. y = 2x-5 Substitute that for y in the second equation and solve for x. Then use the value of x to substitute back into the first equation

    asked by SANDRO! on November 6, 2006
  43. Algebra

    I am confused on how solve this substitution problem 4y+3=3y+x 2x+4y=18 If you can, show work please (:

    asked by Stephanie on February 23, 2013
  44. MATH

    Useing substitution/elimination method what is the solution set to 2x+y=1 x^2=y+2 a)(-3,7) and (1,-1) b)(3,7) and (-1,-1) c)(-3,-7) and (1,1) d)(3,-7) and (-1,1) I've really no educated guess so PLEASE HELP! You can make an educated guess by substituting

    asked by Anonymous on January 17, 2007
  45. math

    Solve by elimination method. 2r-5s=-33 5r+2s=48 Solve by substitution method. 5x+6y=5 x-9y=40 I always get these two confused... can someone please help me with these two problems?? I would really appreciate it..

    asked by Amanda on November 11, 2009
  46. math

    Solve by elimination method. 2r-5s=-33 5r+2s=48 Solve by substitution method. 5x+6y=5 x-9y=40 I always get these two confused... can someone please help me with these two problems?? I would really appreciate it..

    asked by Amanda on November 11, 2009
  47. algebra

    Solve by elimination method. 2r-5s=-33 5r+2s=48 Solve by substitution method. 5x+6y=5 x-9y=40 I always get these two confused... can someone please help me with these two problems?? I would really appreciate it..

    asked by Anonymous on November 11, 2009
  48. algebra

    Solve by substitution method 3x+8y=17 2x+y=14 please show step by step so i can understand better. I keep getting it wrong at the end.

    asked by tara lee on August 1, 2011
  49. Math need by 9pm cst

    Solve by substitution method. Show step by step process. 4x+5y=27 x=26-4y

    asked by SAP on October 1, 2010
  50. Math

    Solve the quadratic function y=2x^2-14x -16 by completing the square. Round roots to the nearest hundredth, if necessary. Show your work.

    asked by Alex on October 30, 2014
  51. algebra HELP PLEEEEASE

    Solve the following system using elimination or substitution. show your work. y = x^2 - 2x - 6 y = 4x + 10 Please explain how to do this and the answer! THANKS!

    asked by help plesze on April 23, 2017
  52. algebra

    Requesting help. (I must reckon, that X is a variable, and y is y-intercept) Q: Try to use the substitution method to solve the the linear system y=3x an y=3x-7. What do you notice? A) What happens when you graph it? B) Explain why there is no solution.

    asked by Michael on October 6, 2008
  53. Pre-Calc

    Solve the system of equations using either the substitution method or the multiplication/addition method answer: 3x+2y=14 2x-4y=4

    asked by Anonymous on September 28, 2014
  54. Algebra II

    How do you solve the linear equations x+y=5 3x-y=3 by use of the Substitution Method? (Please do not confuse with the Elimination Method)

    asked by Ashley on February 25, 2009
  55. Substitution Method

    Use the Substitution method to solve the system of equations. x + y = -4 x - y = 2 x + y = -4 x - y = 2 In the second equation, x= y+2 Putting that in the first.. (y+2) + y= -4 subtract two from each side, then divide each side by two to get y. Then, put

    asked by Margie on October 16, 2006
  56. College Algebra

    Solve for elimination method,substitution method and cramer's rule for 8x - 4y + 2z =16

    asked by MJ on September 1, 2016
  57. Math

    How do I solve these problems, I really need help. Solve by substitution method 6x+5y=17 x=53-8y Solve by elimination method 2x+3y=5 4x+6y=10

    asked by Amy on October 18, 2008
  58. Algebra 1 HELP PLZ!!!

    Use the Substitution method to solve the system of equations. x + y = -4 x - y = 2 PLz HELP!! I'M NOT BOB BUT I CAN HELP ITS REALLY SIMPLE ALGEBRA X + Y = -4......EQN 1 X - Y = 2.....EQN 2 From EQN 2, let x = 2 + y Substitute that into EQN 1 x - y = -4

    asked by Margie on November 3, 2006
  59. Algebra

    Solve this system of linear equations. * Used the substitution method 3x - y = 8 4x - y = -15 ----------------------------------------- WORK y = 3x - 8 4x - (3x - 8 ) = -15 4x - 3x + 8 = -15 x + 8 = -15 x = -7 3x - y = 8 3(-7) - y = 8 -21 - y = 8 -y = 29 y

    asked by Lucina on January 21, 2015
  60. Math please help!!

    Solve the system using substitution. y = -2x + 5 3y = -x - 5 I already got the answer, just wanna make sure it's correct. Please show work as well.

    asked by Melanie on February 28, 2011
  61. How do I do this.?(Math.)

    Use the Substitution method to solve the system of equations. y - 2x = -5 3y - x = 5 Solve one of the equations for x or y. Let's solve the first one for y: y - 2x = -5 y = 2x - 5 Now let's substitute 2x - 5 for y in the second equation to solve for x:

    asked by Margie on February 5, 2007
  62. Math

    1. Explain the advantages and disadvantages of both the substitution method and the elimination method for solving a system. Help please. The only reasons I can think of is because in substitution it might be more difficult cause there's a possibility of

    asked by Amanda on February 19, 2008
  63. Math

    I need help,my example: The sales representative say there are two floor plans available 56 total houses. Use x for floor plan 1 and y for floor plan 2 then write an equation that illistrates the situation. So I thought x+y=56, then sales rep. says there

    asked by dee on November 27, 2009
  64. 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
  65. Math

    Hi I'm having a bit of trouble if anyone is able to help, thanks! Using the substitution u =1-2t^2, show that A = -1/4 ∫_1^(-7)▒e^u du

    asked by Simon on March 21, 2015
  66. Algebra 2

    Solve Quadratic System x^2+y^2=2 x^2-6y=10 Please SHOW WORK I'm having trouble

    asked by Mesa on November 23, 2014
  67. Algebra

    1,Sovle using the substitution method. Show your work. If the system has no solution or an infinite number of solutions,state this. -x - 3y = -20 5x + 3y =40 2 Sovle using the elimination method. Show your work. If the system has no solution or an infinite

    asked by Destiny on September 19, 2011
  68. math

    Solve using the algebraic method. x+5=15 SHOW WORK thanx subtract five from each side. Do you have an allergy to showing work?

    asked by lida on March 30, 2007
  69. Algebra Question

    I did a problem and used the substitution method and it took me forever to solve by hand. Is there a shorter way to show how this problem was done. The problem was x+y+z=7,x-y+2z=7,2x+y+3z=15 The final answer came out to be x=4 z=2 y=1

    asked by mike on December 19, 2009
  70. Substitution Method in Algebra!HELP PLZ!

    Use the Substitution method to solve the system of equations. 3x + y = 5 4x - 7y = -10 multiply first equation by 4 multiply second equation by 3 thus both equations have same x or y value in this case it is the x value. 12x + 4y = 20 12x - 21y = -30 solve

    asked by Matthew on November 5, 2006
  71. math

    Solve by substitution method 9x+6y=21-9x+y=35 What is the solution of the method?

    asked by micheal on June 16, 2009
  72. Algebra

    I have four problems I'm having trouble with. I need to solve the equations by completing the square. 1) w^2 - 5w = 11/4 2) z^2 + 11z = -21/4 3) k^2 - 8k - 7 = 0 4) v^2 - 7v + 1 = 0

    asked by Mary on April 18, 2013
  73. math

    If I use the method of completing the square on 3w^2-4w+1=0 How would I solve??

    asked by I need some explaining on April 20, 2010
  74. mathematics

    solve m2+6m+7 using completing the square method

    asked by anthony on November 4, 2016
  75. maths

    Px^2-(2p+q)x+(p+q)=0 solve by completing of square method

    asked by danmarkiburi on April 8, 2014
  76. Maths

    solve y^2-4y=13 using completing the square method

    asked by Evans on April 17, 2018
  77. Math

    Solve the system of equations using substitution, elimination by addition, or augmented matrix methods (your choice). Show work. 3𝑥 − 2𝑦 = 5 5𝑥 + 3𝑦 = 21

    asked by Ted on March 6, 2016
  78. Algebra 2

    Solving Quadratic System x^2+4y^2=16 x^2+y^2=4 Please SHOW WORK I'm having trouble solve this...

    asked by Mesa on November 23, 2014
  79. Intermediate Algebra (Math)

    HELP PLEASE, Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -2x Ð 8y = 22 -6x Ð y = 20 At first I tried to multiply by 8 but that did not work.

    asked by Lyri on October 11, 2010
  80. math

    2. Simplify. Please be sure to show all of your work. -3(-9) – |-5 – 3 3. Simplify. Please show all of your work 9c^3+7c-(3c^3-12+c) 4. Solve 4x- 3(5x-8) =23-9(x+2) . Please show all of your work 5. Solve the following equation for z. Please show all

    asked by christine on August 15, 2011
  81. Math

    Solve the system using any algebraic method. 2x - 2y + z = 3 5y - z = -31 x + 3y + 2z = -21 ______________________ The answer I got for this is ( -26, 6,67) but I know its wrong and I don't know why. Help please >< my work is at the bottom I used

    asked by Linda on November 1, 2011
  82. calc

    correction: 9/25(u+7)u^11 du = 9/25(u^12 + 7 u^11) du and you can easily integrate this indefinate integral of 9x(5x-7)^11 dx using the u substitution method: i know u= (5x-7) but when i use this the x in the 9x doesn't cancel thus x= (u+7)/5. however when

    asked by Count Iblis on December 4, 2006
  83. Maths integration

    Please help! These 2 questions are very similar, and i tried to do completing square method, but i cant get the correct answer! I'm trying to get the dy/dx to be a complete square thingy to show that the value is always greater or equal to 0. 1. Show that

    asked by Aoi on June 19, 2009
  84. Math

    solve by addition method: please show work. -3x + y = 3 2x -3y =7

    asked by HELEN on March 14, 2010
  85. Algebra 2 URGENT

    Solve the problem using the "z" method. Please Show All Work! u^4+6=-5u^2

    asked by Trisan on November 19, 2009
  86. MATH

    Solve the equation using completing the square method x^2-6x+9 Please I need your solutions

    asked by Simon on February 26, 2018
  87. maths --plse help me..

    solve the following equation by method of completing the perfect square:- 4x^2 + 4 √3 x +3=0

    asked by Anonymous on December 13, 2012
  88. math

    solve by completing square method 16x^2-24x-13=0

    asked by simran on June 28, 2015
  89. Math

    Solving quadratic equations by completing the square. Could you show me every step how to do it. That way I'll know probably know how to do the other ones. With that method you use. 1/2x^2 + x -13 = 0

    asked by Basil on October 30, 2009
  90. Geometry

    To solve for the following proportion, you could use equivalent ratios, divide out the known ratio, or use cross products. Choose one of these methods to solve for t. Show your work and explain why you chose that method.

    asked by Anonymous on April 1, 2011
  91. math

    To solve for the following proportion, you could use equivalent ratios, divide out the known ratio, or use cross products. Choose one of these methods to solve for t. Show your work and explain why you chose that method. 18/5 = 4/t

    asked by Alexandra on June 6, 2011
  92. 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
  93. Algebra 2 URGENT

    Solve the equation using the method that seems easiest. Please Show All Work! x^2+12=0

    asked by Trisan on November 19, 2009
  94. Algebra

    Ok, I tried watching a video on how to solve a system by substitution. But I feel like I did it wrong, so can someone check my work and show/ tell me where I went wrong. So the system by substitution -2x-3y=-2 Y=2x+6 First I combined my 2 equations but

    asked by Samantha on October 10, 2017
  95. Math

    I still don't know how to directly solve this problem. Can someone guide to solve this system of equation by using the substitution method? Thanks! 1. Y=6x-5 Y=-x+9

    asked by Anonymous on January 30, 2014
  96. Algebra 2

    Completing the square method allows you to solve any quadratic equation. For each of the following determine what number completes the square. I cannot find my notes on completing the square, can someone please help with these two problems? 1. x^2+8x 2.

    asked by Christian on May 21, 2007
  97. college algebra

    please solve by method of substitution 0.3x-0.4y-0.33=0 0.1x + 0.2y -.21=0 please give all steps to solve.I think I understand the basic concept but this is little more complicated for me. Thanks in advance

    asked by Nadia on November 24, 2009
  98. 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
  99. algebra

    use the Substitution Method. Please give it a try. y = 3x + 4 5x + 3y = 12 Why is the substitution method preferred in this case?

    asked by Maya on April 6, 2011
  100. College Algebra

    solve by the the substitution method 8x+9y=-39

    asked by Tiffany on February 2, 2014