Solving Systems of Equations by Substitution and Elimination
Quiz
•
Mathematics
•
10th - 12th Grade
•
Practice Problem
•
Medium
Standards-aligned
Dennis Murphy
Used 62+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
What is the best method do you use?
y = 6x − 11
−2x − 3y = −7
Graphing
Substitution because a variable is defined
Elimination because both equations are in standard form.
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
What is the best method to use?
−4x − 2y = −12
4x + 8y = −24
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
15 mins • 1 pt
What is the proper way to set up the equation to begin solving?
y = 6x − 11
−2x − 3y = −7
-2(-11) -3y= -7
-2(6x-11) -3y = -7
-2x -3(11) = -7
-2x - 3(6x-11)= -7
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
What variable do you eliminate?
4x + 8y = 20
−4x + 2y = −30
X because they have opposite signs
Y because they have opposite signs
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
What variable do you eliminate, and what do you multiply the equation(s) by?
5x + y = 9
10x − 7y = −18
You eliminate x, and multiply the top equation by -2
You eliminate y, and multiply the top equation by 7
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
What variable do you eliminate and how?
7x + 2y = 24
8x + 2y = 30
You pick x because it's LCM is 56
You pick y because it's LCM is 2.
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
7.
MULTIPLE CHOICE QUESTION
15 mins • 12 pts
Solve for x and y
3x + 2y = 16
7x + y = 19
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
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