3/23 - Solve Systems of Equations Elimination Quiz

1. Which ordered pair is a solution to the system of equations? 1x + 1y = 20 1x - 1y = 10 (18, 2) (12,2) (15, 5) (5, 15) 2. What value of x satisfies the system of equations below? x + 2y = 20 3x - 2y = 12 6 8 4 none of these 3. Solve the system of equations. 5x + 2y = 12 -5x + 2y = -28 (5, -6.5) (4, -4) (-4, 4) (4, 16) 4. Solve the system of equations.Hint: You will need to multiply one of the equations by -1. (Show Work!!!!!) 2x + y = -5 2x - 5y = 13 5. Solve the system of equations.Hint: You will need to multiply one of the equations by -1. (Show Work!!!!!) −2x − 9y = −25 −4x − 9y = −23 6. Solve the system of equations.Hint: You will need to multiply in order to solve this. (Show all work) 3x − 2y = 2 5x − 5y = 10 7. Solve the system of equations.Hint: You will need to multiply in order to solve this. (Show all work) -8x + 18y = -22 -6x + 14y = -8 8. Solve the system of equations.Hint: You will need to multiply in order to solve this. (Show all work) 3x + 2y = -18 2x + 9y = -12