Solve Systems of Equations by substitution & elimination
Mathematics
8th - 9th Grade
CCSS covered
Used 3+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 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
30 sec • 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
45 sec • 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
30 sec • 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
5 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
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Solve the system given:
3x - y = 7
2x + y = 3
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
7.
MULTIPLE CHOICE QUESTION
30 sec • 12 pts
Solve the system:
x+ 3y = 9
2x+ y = −2
(3,2)
(-2, 2)
(3, -4)
(-3, 4)
(0.5, -3)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
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