Elimination Opposite Coefficients
Authored by Barbara White
Mathematics
9th Grade
CCSS covered
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10 questions
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1.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Solve by elimination:
7x + y = -9
-3x - y = 5
No solution
(1,8)
(-1,-3)
(-1,-2)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
2.
MULTIPLE CHOICE QUESTION
10 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
3.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Solve by elimination:
-6x + 5y = 1
6x + 4y = -10
(-1,7/5)
(0,-1)
(1,1)
(-1,-1)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
4.
MULTIPLE CHOICE QUESTION
10 mins • 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
5.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Solve by elimination:
7x + y = -9
-6x - 2y = 10
No solution
(1,8)
(-1,-3)
(-1,-2)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
6.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Solve using elimination:
6x + 6y = -6
3x - 2y = 12
(-4,3)
(-3,2)
(2,-3)
(3,-4)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
7.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Which step could you do to get "opposite coefficients" so you can use the elimination method?
4x + 3y = 1
x - 5y = -11
Multiply the entire 2nd equation by -4
Multiply the entire 2nd equation by 3
Multiply the entire 1st equation by -1
Multiply the entire 1st equation by 5
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
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