Systems of Equations Elimination
9th Grade
•20 Qs
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Systems of Equations Elimination
Quiz
•
Mathematics
•
9th Grade
•
Medium
Standards-aligned
Jesse Stamper
Used 43+ times
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
I can combine 2 linear equations if the coefficients are not opposites.
True
False
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Solve by elimination:
3x+7y=23
-3x-7y=-17
No solution
ARN
(-3,3)
(3,3)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Solve using elimination.
4x + 8y = 20
-4x + 2y = -30
(-7,1)
(2,-5)
(-2,5)
(7,-1)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Let's multiply the top equation by -2. What would be our new equation?
2x + 3y = 12
4x - 7y = - 54
4x - 6y = -24
-4x - 6y = 12
-4x - 6y = 24
-4x - 6y = -24
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Now, our equations will look like this
-4x - 6y = -24
4x - 7y = - 54
Let's combine (add) these 2 equations to ELIMINATE the x variable. What would our combined equations be?
-1y = 30
13y = -30
-1y = -78
-13y = -78
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Let's solve for y.
-13y = -78
y = 6
y = 1
y = 8
y = 30
Tags
CCSS.6.EE.B.7
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Now, let's find the solution to the system.
2x + 3y = 12
4x - 7y = - 54
(-3, 2)
(-3, -2)
(6, -3)
(-3, 6)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
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