Systems Quiz 2 (elimination)

Solve using elimination. 
 4x + 8y = 20
-4x + 2y = -30

• (-7,1)
• (2,-5)
• (-2,5)
• (7,-1)

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

• (-7,0)
• (6,0)
• (-6,0)
• (7,0)

What would be the first step in finding the solution with elimination?

4x + 3y = 1

x - 3y = -11

• cross out the 3y and -3y

• cross out the 4x and x

• change all the signs of the second equation

• add 1 and -11

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What would be the first step in finding the solution using elimination?

2x + 2y = -2

3x - 2y = 12

• you cannot solve this using eliminiation

• cross out the 2x and 3x

• cross out the 2y and -2y

• change to slope intercept form and graph

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the solution to this system?

• (-2, -2)
• (2, -2)
• (-2,2)
• (2, 2)

Solve for x and y:
5x - 3y = 10
3x + 3y = 30

• x = 3, y = 2
• x = 5, y = 5
• x = 10, y = 6
• x = 4, y = 6

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve (choose any method)

5x+6y= -10

3x-2y= -6

• (-2,0)

• (0,-2)

• (2,0)

• (0,2)

Solve 
2x + 4y = 7 
2x – 4y = -3 

• (2,3)
• (5⁄4,1)
• (1,5 ⁄4)
• (3,2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

The solution is:

• (4, 3)
• (3, 4)
• (-4, 3)
• No solution

Tags

CCSS.8.EE.C.8A

solve the system of equation using elimination

x - 2y = -19

5x + 2y = 1

• (3, -8)

• blah blah blah

• (1, 0)

• (-3,8)