The Elimination Method
Authored by Anthony Clark
Mathematics
9th Grade
CCSS covered
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9 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 12 pts
Solve the following system by using elimination:
-9x - 2y = -23
-10x - 5y = -20
(-3, -2)
(3, 2)
(3, -2)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Name the method for solving a system of equations by "getting rid of" one of the variables first to solve for the other variable.
Graphing
Substitution
Elimination
Drawing
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Describe the error in solving this system of equations using the Elimination Method.
They eliminated the x terms when they should have eliminated the y terms.
They subtracted 5x and x to get 4x, but they should have added the x terms to get 6x = 24.
They added 16 and 8 to get 24, but they should have subtracted them to get 8 on the right side of the equation.
They eliminated the y terms, but they couldn't because one is a negative and one is a positive.
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What would be the first step in solving this system using the Elimination Method?
2x + 2y = -2
3x - 2y = 12
You cannot solve this using the Elimination Method.
Cross out the 2x and 3x
Add the like terms. The y terms will cancel out.
Change to slope intercept form and graph
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the best first step in solving a system of equations by the Elimination Method?
Get both equations in the Standard Form and line up the like terms.
Get both equations in graphing form.
Get both equations equal to zero.
Eliminate all of the constants.
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which is the best method for solving this system of equations?
- 4x - 2y = - 12
4x + 8y = - 24
Substitution
Elimination
Transition
Multiplication
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the resulting combined equation to the following system of equations when using the Elimination Method?
8y = 15
10y = 15
10x = 15
25x = 15
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
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