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Solve Systems by Substitution and Elimination

Authored by Stephanie Mcintyre

Mathematics

9th Grade

CCSS covered

Used 2+ times

Solve Systems by Substitution and Elimination
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20 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Does the system have one, none or infinite solutions?

y = 2x -11

y = 2x +5

One

None

Infinitely many solutions

Tags

CCSS.8.EE.C.8B

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Solve the system by substitution:

x - y = 6

y - 2x = - 5

(1,3)

(-1,3)

(-1,-7)

(1,-7)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

3.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

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

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the solution to this system?
x= 7 - 2y
2x + y = 5

(-1,4)
(4,-1)
(1,3)
(3,1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The first step in solving using the substitution method is __________.

get x by itself
get y by itself
get either variable by itself
add the equations together

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

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

7.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Solve using elimination. 
−4x − 4y = 0
4x + 4y = 0 

(−6, −4) 
Infinite number of solutions  
(−6, 10) 
(6, 4) 

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

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