Solving systems of equations
Authored by Jarica Williams
Mathematics
8th Grade
CCSS covered
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20 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
2x - 6y = 20
2x + 5y = -11
what would the top equation become when you multiply everything by -1?
2x - 6y = 20
-2x - 6y = -20
-2x + 6y = 20
-2x + 6y = -20
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
2.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
4x + 8y = 20
-4x + 2y = -30
Which variable will be eliminated?
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
3.
MULTIPLE CHOICE QUESTION
15 mins • 5 pts
What would be the first step in finding the solution with elimination?
4x + 3y = 1
x - 3y = -11
cross out the 3y and -3y
cross out the 4x and x
change all the signs of the second equation
add 1 and -11
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
4.
MULTIPLE CHOICE QUESTION
20 sec • 5 pts
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
5.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
what is the resulting combined equation to the following system:
5x - 4y = 11
5x + 4y = -14
5x = -3
10y = -3
10x = -3
10x = -25
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
6.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
what is the resulting combined equation for the system below?
9x + y = 12
-9x + y = 6
-18x = 18
y = 18
2y= 18
18x + 2y = 18
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
7.
MULTIPLE CHOICE QUESTION
15 mins • 5 pts
What would be the first step in finding the solution with elimination?
4x + 3y = 1
x - 3y = -11
cross out the 3y and -3y
cross out the 4x and x
change all the signs of the second equation
add 1 and -11
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
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