Elimination System
Authored by Anthony Clark
Mathematics
8th Grade
CCSS covered
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19 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Solve by elimination:
7x-9y=29
7x+2y=-15
(-4,-1)
(-1.-4)
(-1,4)
(-1,6)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Solve by elimination:
9x-4y=7
x-4y=-17
(-1,5)
(-7,5)
(7,5)
(3,5)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If you add these equations together which variable is going to eliminate?
x
y
4
Answer explanation
-4x + 4x = 0x = 0
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
4.
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
5.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
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
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Solve using elimination method.
x-y=11
2x+y=19
(10,-1)
(-1,10)
(3,-4)
(6,7)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Solve by elimination:
-9x-4y=-20
5x+4y=4
(-4,4)
(4,4)
(4,-4)
(-4,-4)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
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