Test Review - Chapter 5

Is (4, 1) a solution to the system:
x + y = 5
y = 2x - 7

• yes
• no
• can't tell

Is (2, 13) a solution to the system:

y=5x+3

y=-2x-4

• Yes

• No

• can't tell

Is (-3, -7) a solution to the system:
-4x + y = 5
x - y = 4

• YES
• NO
• can't tell

Which of the following would work to create opposites for the system:

−7x + 6y = 29
10x + y = 16 

• Multiply the top by 3

• Multiply the bottom by 6

• Multiply the bottom by -6

• can't tell

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve by elimination:
-2x + y = 1
-4x + y = - 1

• (1,3)
• (-1,-3)
• (-1,3)
• (3,1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve by substitution:
2x - 8y = -20
x = 3y - 5

• (-15, 7)

• (-5, 1)

• (10, 5)

• (2, 1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the System using Elimination.
-2x - 7y = 14
-4x - 14y = 28

• no solution

• infinite

• (7, -4)

• (0, 2)

Tags

CCSS.8.EE.C.8B

Solve by substitution:
y = 2x - 8
4x - 2y = 11

• No Solution

• Infinite

• (-3,1)
• (3,-1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

• One Solution (x, y)

• No solution
• Infinitely Many Solutions

Tags

CCSS.8.EE.C.8B

• One Solution (x, y)

• No solution
• Infinitely Many Solutions

Tags

CCSS.8.EE.C.8B