Systems of Equations Elimination
Authored by Barbara White
Mathematics
9th - 11th Grade
CCSS covered
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20 questions
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1.
FILL IN THE BLANKS QUESTION
15 mins • 1 pt
-8x - 7y = 10
-8x + 5y = 34
answers in (x,y)
(a)
Tags
CCSS.8.EE.C.8B
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
-2x + y = 1
-4x + y =- 1
answers in (x,y)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
If a system of equations has no solution, what does the graph look like?
intersecting lines
parallel lines
coincident lines
intersecting lines
Tags
CCSS.8.EE.C.8A
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
If a system of linear equations has one solution, what does this mean about the two lines?
Parallel lines
The same line
Intersecting lines
Coincident lines
Tags
CCSS.8.EE.C.8A
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Robert is thinking of two numbers. Their sum is -10 and their difference is -2. Which system of equations represents this situation?
x - y = -10 and x + y = -2
x = -2 and y = -10
x + y = -10 and x - y = -2
x + y = -2 and x - y = -10
Tags
CCSS.HSA.CED.A.3
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Erin is 3 years younger than twice Alex's age. Their ages combined are 33 years. How old are Alex and Erin. If x=Erin's age and y=Alex's age, choose the system that matches the situation.
y = 2x - 3
x = 2y - 3
x = 3 - 2y
x = 33 - 2y
Tags
CCSS.HSA.CED.A.3
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Identify which method for solving systems is being described by this fact:
Use an isolated variable and plug that expression into the second equation in order to solve for the other variable. Plug that value back into the original isolated equation to solve for the second variable.
Graphing
Substitution
Elimination (adding or multiplying)
All 3 methods
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
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