Chapter 4 Classwork 2 - DELTA

A student is solving this system by elimination.

Put the steps in order to find the solution to the system of equations.

−7x + y = -19

-2x + 3y = -19.

• -7x + y = -19

  -7(2) + y = -19

  -14 + y = -19

  • +14 +14

  • y = -5

• 19x = 38

• 19x = 38

  19 19

  x = 2

• 21x - 3y = 57

  • + -2x + 3y = -19

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

If this system of equations was being solved by elimination what would we multiply by to cancel the x terms out?​ (a)  

16x - 10y = 10

-8x - 6y = 6

• 2
• -2
• 4
• -4
• -6
• -10
• 6
• 10

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve each system by elimination. Order the steps

-4x - 15y = -17

-x + 5y = -13

• -4x - 15y = -17

  • + 4x - 20y = 52

  • -35y = 35

• -4x - 15y = -17

  -4x - 15(-1) = -17

  -4x + 15 = -17

  -15 -15

  -4x = -32

  -4 -4

  x = 8

• -4x - 15y = -17

  -4(-x + 5y = -13)

• -4x - 15y = -17

  4x - 20y = 52

• -35y = 35

  -35 -35

  y = -1

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve this system by elimination. Write your answer as a coordinate! (x, y)

-7x - 8y = 9

-4x + 9y =-22

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system using elimination.

-4x - 2y = 14

-10x + 7y = -25

• (1, -5)

• (-1, 5)

• (1, 5)

• (-1, -5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve using elimination. Write your answer as a coordinate (x,y)

5x + 4y = −14

3x + 6y = 6

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What would the first step to solving this system be if we were using elimination?

-14 = -20y - 7x

10y + 4 = 2x

• Re-arranging the bottom equation so x and y were on the same side.

• Multiply the bottom equation by 2

• Divide the bottom equation by 2

• Subtract the top equation from the bottom equation

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system using elimination. Write your answer as a coordinate (x, y)

8x + 14y = 4

-6x - 7y = -10

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system using elimination

-x - 7y = 14

-4x - 14y = 28

• (0, -2)

• (-2, 0)

• (0, 2)

• (2, 0)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system using elimination

5x + 4y = -30

3x - 9y = -18

• (0, -6)

• (0, 6)

• (-6. 0)

• (6, 0)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6