Systems - Substitution
Authored by Jillian Garzel
Mathematics
8th Grade
CCSS covered
Used 13+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What does it mean to substitute?
to add different variables together and see what you get
to graph and find the intersection
guess and check
to replace the value of a variable with an equivalent expression
Tags
CCSS.6.EE.A.2C
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which one shows the correct substitution for the system?
y = 2x + 1
2x - 3y = 7
2(2x + 1) - 3y = 7
2x - 3(2x + 1) = 7
y + 2x - 3y = 8
2x - 2x + 1 = 7
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Simplify.
2x - 3(2x + 1) = 7
2x - 6x - 3 = 7
2x - 5x + 1 = 7
2x - 6x + 3 = 7
2x - 2x -3 = 7
Tags
CCSS.6.EE.A.3
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Simplify.
2x - 6x - 3 = 7
-7x = 7
4x + 3 = 7
8x - 3 = 7
-4x - 3 = 7
Tags
CCSS.7.EE.B.4A
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Solve.
-4x - 3 = 7
x = -2.5
x = -40
x = 0.4
x = -1
Tags
CCSS.7.EE.B.4A
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If x = -2.5 what does y equal?
y = 2x + 1
2x - 3y = 7
y = 0.75
y = -4
y = 5.5
y = 9
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which one shows the correct substitution for the system?
x = 7 + y
y = 7 - 2x
x = 7 + (7 - 2x)
y = 7 - 7 + y
x = 7 + 7
7 + y = 7 - 2x
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
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