Solving with Elimination
Authored by Anthony Clark
Mathematics
9th Grade
CCSS covered
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14 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
7x - y = 10
-7x + y = -14
No Solution
(4, 1)
Infinitely Many Solutions
(2, -4)
Answer explanation
7x - y = 10
-7x + y = -14
All of the like terms have opposite coefficients, so both variables will be eliminated when we add the equations together. We cannot eliminate one without the other.
We are left with:
0=-4
This is a contradiction (false), so there is NO SOLUTION.
Tags
CCSS.8.EE.C.8B
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Solve using Elimination Method:
4x+ 9y = 28
-4x -y = -28
(-7,0)
(6,0)
(-6,0)
(7,0)
(6,7)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
3.
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
4.
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
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
solve the system
No solution
infinite solutions
(0,0)
(5,1)
(5,0)
Tags
CCSS.8.EE.C.8B
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
−4x − 4y = 0
4x + 4y = 0
(−6, −4)
Infinite number of solutions
No Solution
(6, 4)
(0,0)
Tags
CCSS.8.EE.C.8B
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Solve by elimination.
6x - y = 2
-3x - 6y = 12
(2,0)
no solution
(0,-2)
infinite solutions
Tags
CCSS.8.EE.C.8B
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