Algebra

What are the solutions to the system? (Hint: graphing is the easiest!)
y = x2 + 2x - 45
y = -3x + 5

  1. 👍 0
  2. 👎 0
  3. 👁 132
asked by Selena
  1. well, it is hard for me to graph here so

    eliminate y by subtracting the second equation from the first

    x^2 + 5 x -50 = 0

    (x-5)(x+10) = 0
    so
    x = 5 or x = -10
    if x = 5, then y = -10
    if x = -10 then y = 35

    1. 👍 0
    2. 👎 0
    posted by Damon
  2. Next easiest is by comparison.

    Solve the quadratic by factoring
    -3x+5 = x² +2x -45
    x²+5x-50=0
    (x+10)(x-5)=0
    x=5 or x=-10
    Substitute x to find corresponding values of y.

    1. 👍 0
    2. 👎 0
    posted by MathMate
  3. thank you peeps

    1. 👍 0
    2. 👎 0
    posted by Selena

Respond to this Question

First Name

Your Response

Similar Questions

  1. Algebra 2

    I need help with this problem because I do not have a graphing calculator. Explain how you would solve this equation using your graphing calculator in five steps then give the solution. 2x- 3y=8 5x+ 4y= 11 Also how do you

    asked by Christian on October 22, 2007
  2. Math

    5. Find the solution to the system of equations by using either graphing or substitution. y = 6 – x and y = x – 2 (2, 4) (–4, 2) (4, 2) no solutions 6. y = 2x – 1 and y = x + 3 (1 point)(4, 7) (7, 4) (–7, –4) infinite

    asked by Mr.Brain on May 2, 2013
  3. Algebra

    Find the number of the solutions to each system. a. 4x-y+1=0 4x-y+3=0 b. 2x-y+4=0 4x-2y+8=0 Write a question that can be solved using a system of linear equations. Solve the following system of equations by graphing: y=x+3 and

    asked by LadyPhantomhive on January 13, 2016
  4. math

    i don't understand what to do.if someone can tell me what to do i can try to get the answer. solve each system by graphing.identify systems with no solutions and systems with infinitely many solutions, using set notation

    asked by alexh on September 8, 2009
  5. URGENT~MATH For Steve or Reiny

    For questions 5-7, find the solution to the system of equations by using either graphing or substitution. 5)y=6-x and y=x-2 (1point) (2,4) (-4,2) (4,2) no solutions 6)y=2x-1 and y=x+3 (1point) (4,7) (7,4) (-7,-4) no solutions 7)

    asked by Gabby on May 7, 2013
  1. Algebra

    Solve the system of equation by graphing. Then classify the system. 3x + y = 4, 4x + 5y = -24. Solution: Infinitity many solutions, no solution, System inconsistent/ consistent, Equation dependent/ independent.

    asked by B.B. on April 11, 2010
  2. math

    For questions 5–7, find the solution to the system of equations by using either graphing or substitution 5. y = 6 – x and y = x – 2 (1 point) (2, 4)*** (–4, 2) (4, 2) no solutions 6. y = 2x – 1 and y = x + 3 (1 point)

    asked by Linda on March 24, 2015
  3. Univ of Phoenix

    Solve the system of equations by graphing. Then classify the system. x+y=9 x-y=3 Use graphing tool to graph the system

    asked by Yvette on December 20, 2011
  4. math

    find the solution to the system of equations by using either graphing and substitution y = 6 - x and y = x - 2 (2,4) (-4,2) (4,2) no solutions I think this one is the third answer am I right?

    asked by Nisabel on May 21, 2013
  5. Algebra II

    1)What method(s) would you choose to solve the equation: x2 + 2x - 6 = 0 A. Square roots; there is no x-term. B. Quadratic formula, graphing; the equation cannot be factored easily since the numbers are large. C. Factoring; the

    asked by Hally on January 15, 2013

More Similar Questions