Pick the Method Elimination, Substitution
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 is the best method to use?
2x − 3y = −1
y =x − 1
Graphing
Substitution because a variable is defined
Elimination because the equations are in standard form.
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the best method to use?
4x + 8y = 20
−4x + 2y = −30
Graphing
Substitution because a variable is defined
Elimination because the equations are in standard form
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
3.
MULTIPLE CHOICE QUESTION
1 min • 12 pts
Solve for x and y
3x + 2y = 16
7x + y = 19
(-2,5)
(-2,-5)
(2,-5)
(2,5)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What should you multiply the TOP equation by so that the x's will cancel out?
2x - 5y = 10
4x + 15y = -10
-2
2
3
-3
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
5.
OPEN ENDED QUESTION
1 min • 1 pt
In the Worked Example, only one equation needs to be rewritten to solve using the elimination method. Why?
Evaluate responses using AI:
OFF
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
what is the variable that willl be "eliminated"?
-5x +4y = -11
5x + 4y = -14
x variable
y variables
both variables
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Solve for x and y. Show all work for credit. 3x + 2y = 16 7x + y = 19
(-2,5)
(-2,-5)
(2,-5)
(2,5)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
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