Systems of Equations Elimination Method
Authored by Anthony Clark
Mathematics
9th Grade
CCSS covered
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
what is the resulting combined equation for the system below?
-18x = 18
y = 18
2y= 18
18x + 2y = 18
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
2x - 6y = 20
2x + 5y = -11
what would the top equation become when you multiply everything by -1?
2x - 6y = 20
-2x - 6y = -20
-2x + 6y = 20
-2x + 6y = -20
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
what do you need to multiply the top equation by to make a zero pair:
5x - 2y = 11
-10x + 3y = -4
5
-1
2
-2
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
what does the top equation need to be multiplied by to create a zero pair?
2x - 6y = 20
2x + 5y = -11
-1
1
-2
2
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Solve the following system by using elimination:
-2x - 5y = -15
x + 8y = 13
(5, 1)
(1, 5)
(5, -1)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
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
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Solve by elimination:
3x + 7y = 23
-3x - 7y = -17
No solution
Infinite number of solutions
(-3,3)
(3,3)
Tags
CCSS.8.EE.C.8B
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