Solving Systems by Graphing and Elimination

What is the solution to the system?

• No solution

• (0, 2)

• (0, -4)

• (3, -3)

Tags

CCSS.8.EE.C.8A

What is the solution to this system of equations? Solve by substitution or graphing.

• (7, -8)

• (-7, 8)

• (-7, -8)

• (7, 8)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by elimination.

7x - y = -10

-7x + 5y = -6

• (-2, -4)

• (-2, -1)

• (-4, -1)

• (6, -8)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Alexandra finds that she can give 3 haircuts and 2 hair dyes in 315 minutes. Giving 2 haircuts and 4 hair dyes takes 450 minutes.  Which system of equations represents the situation?

• 3x + 2y = 315
  2x + 4y = 450

• 3x + 2y = 450
  2x + 4y = 315

• 2x + 2y = 315
  3x + 4y = 450

Tags

CCSS.8.EE.C.8C

Determine how many solutions the system has.
(Hint:  Both lines are graphed over each other)

• One Solution

• No solution

• Infinitely Many Solutions

• I am Spartacus!

Tags

CCSS.8.EE.C.8A

-4x-2y=-12
      4x+8y=-24

• (6,-6)

• (-6,6)

• (6,6)

• (-6,-6)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

7x + 4y = -6
-7x - 6y = 30
answers in (x,y)

• (6, -12)

• (6, 12)

• (-12, 8)

• (12, -8)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

-8x - 7y = 10
-8x + 5y = 34
answers in (x,y)

• No Solution

• (-3, -10)

• (3, 2)

• (-3, 2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

-2x + y = 1
-4x + y =- 1
answers in (x,y)

• (1,3)

• no solution

• (-1,3)

• (3,1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

-3x+3y = 18
5x-3y = -26
answers in (x,y)

• (4,2)

• (-4,-2)

• (-4,2)

• (4,-2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6