Solve Systems by Elimination Steps
Authored by Anthony Clark
Mathematics
9th Grade
CCSS covered
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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What would be the first step in finding the solution using elimination?
you cannot solve this using eliminiation
cross out the 2x and 3x, because when you add them, they equal 0
cross out the 2y and -2y because when you add them, they equal 0
change to slope intercept form and graph
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
4x + 8y = 20
-4x + 2y = -30
When you solve these equations using the elimination method, which variable will be eliminated?
The x
The y
The z
The unknown
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
To find the second variable, substitute the x or y you solved for into one of the ____.
original equations
one of the manipulated equations
the top equation, always
the bottom equation, always
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
4.
REORDER QUESTION
1 min • 1 pt
Order the algorithm (steps) to elimination
multiply equation(s) to have opposite coefficients, if necessary
Align like terms vertically
Determine the variable to eliminate
Solve for variable
add vertically
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
5.
MULTIPLE CHOICE QUESTION
1 min • 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
6.
FILL IN THE BLANK QUESTION
1 min • 1 pt
The solution is...
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
7.
GRAPHING QUESTION
1 min • 1 pt
Solve the system. Plot the solution on the graph.
2x + 9y = -7
6x - 3y = 9
Tags
systems
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