Solving Systems by Elimination with Multiplication
Interactive Video
•
Mathematics
•
8th - 12th Grade
•
Practice Problem
•
Hard
Standards-aligned
Amelia Wright
FREE Resource
Standards-aligned
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step if there are no common coefficients in the given system of equations?
Add the equations directly.
Divide one equation by a number.
Multiply one or both equations by a number to create matching coefficients.
Subtract the equations directly.
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In Example 1, what is the result of multiplying the top equation by -2?
2x + 6y = 12
-2x - 6y = -12
2x - 6y = 12
-2x + 6y = -12
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
After finding y = 1 in Example 1, which equation is used to find the value of x?
The unused equation.
The rearranged equation.
The equation with the smaller coefficients.
The equation with the larger coefficients.
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In Example 2, why is the bottom equation multiplied by -3?
To make the coefficients of y the same.
To make the coefficients of x the same.
To simplify the equation.
To make the signs of the coefficients opposite.
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the solution to the system in Example 2?
(3, 1)
(2, 5)
(-1, 7)
(1, -3)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In Example 3, why are both equations multiplied by different numbers?
To make the coefficients of x the same.
To simplify the equations.
To make the coefficients of y the same.
To make the signs of the coefficients opposite.
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the solution to the system in Example 3?
(-2, 5)
(3, -3)
(-1, 7)
(1, 2)
Tags
CCSS.8.EE.C.8B
CCSS.HSA.REI.C.6
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