Elimination Systems

Solve by elimination:
4x+9y=28
-4x-y=-28

• (-7,0)
• (6,0)
• (-6,0)
• (7,0)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve by elimination:
7x+y=-9

-3x-y=5

• No solution
• (1,8)
• (-2,-3)
• (-1,-2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

3x  - 3y = 33
6x - 3y = 57

• (8,-3)
• (-3,8)
• (10,1)
• (10,-1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve by elimination:
7x-9y=29

7x+2y=-15

• (-4,-1)
• (-1.-4)
• (-1,4)
• (-1,6)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the first step in solving this system using elimination?

-8x + y = 2

2x - 3y = 16

• Eliminate Right Away

• Multiply the top equation by 3

• Multiply the bottom equation by 8

• None of these would work.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the first step in solving this system using elimination?

-3x + 4y = 0

-9x + 6y = 18

• Eliminate Right Away

• Multiply the top equation by -3

• Multiply the top equation by 3

• Multiply the bottom equation by 4

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the first step in solving this system using elimination?

6x - 3y = 6

-3x + 3y = -3

• Eliminate the x variables right away.

• Eliminate the y variables right away.

• Multiply the top equation by 2.

• None of these would work.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the System.

• (-2,1)

• (6,-2)

• (6,3)

• (3,8)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

The school that Stefan goes to is selling tickets to a choral performance. On the first day of ticket sales the school sold 3 senior citizen tickets and 1 child ticket for a total of $38. The school took in $52 on the second day by selling 3 senior citizen tickets and 2 child tickets. Which equations represents the system that could be used? 

• 1s + 3c = 38
  2s + 3c = 52
• 3s + 1c = 38
  3s + 2c = 52
• s + c = 38
  s + c = 52
• 3s + 3c = 38
  1s + 2c = 52

Tags

CCSS.8.EE.C.8C

Solve the system

3x - 2y = 2

5x - 5y = 10

• No Solution

• x = -2

• ( 2 , 4 )

• ( -2 , -4 )

Tags

CCSS.8.EE.C.8B