Substitution
9th Grade
•12 Qs
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Substitution
Quiz
•
Mathematics
•
9th Grade
•
Medium
Standards-aligned
Jason Malkowski
Used 44+ times
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12 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Solve this system of equations by substitution:
y = -1x - 5
4x - 8y = 4
4x - 8(-1x - 5) = 4
4(-1x - 5) - 8y = 4
4x - 8 = -1x - 5
-1x - 5 = -8
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the SECOND STEP in solving this system by substitution?
y = -1x - 5
4x - 8y = 4
First step: 4x - 8(-1x - 5) = 4
4x - 8x - 40 = 4
4x + 8x + 40 = 4
4x + 8x - 40 = 4
4x - 8x + 40 = 4
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Solve:
y = 7x + 9
2y + 2x = -18
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the SECOND STEP in solving this system.
x= 7 - 2y
2x + y = 5
FIRST STEP: 2(7 - 2y) + y = 5
14 - 2y + y = 5
14 - 4y + y = 5
14 + 4y + y = 5
14 + 2y + y = 5
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the first step to solving this system of equations by substitution?
x = -3y - 17
2x + 3y = -7
2(-3x - 17) + 3x = -7
2x + 3(-3x - 17) = -7
2(-3y - 17) + 3y = -7
2(3y + 17) + 3y = -7
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the first step to solving this system of equations by substitution?
y=8x+1
y=6x+3
y = 6(8x + 1)
-8x - 1 = 6x + 3
x = 8(6x + 3)
8x + 1 = 6x + 3
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the first step to solving this system by substitution?
y = 4x - 10
y = 3x - 5
y = 4(3y - 5) - 10
y = 3(4x - 10) - 5
4x - 10 = 3x - 5
y = y
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
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