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Math 8: Solving Systems of Equations by Elimination

Authored by Rosanna Ingram

Mathematics

8th Grade

CCSS covered

Used 2+ times

Math 8: Solving Systems of Equations by Elimination
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11 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the first step in solving a system of equations by elimination?

Get both equations in standard form and line up the like terms.
Get both equations in slope-intercept form.
Get both equations equal to zero.
Put the x terms first.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A system of two parallel lines will have how many solutions?

One Solution
Two Solutions
No Solution
Infinite Solutions

Tags

CCSS.8.EE.C.8B

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A system of two identical (overlapping) lines will have how many solutions?

One Solution
Two Solutions
No Solution
Infinite Solutions

Tags

CCSS.8.EE.C.8A

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the next step in solving this system by elimination?
2x + 3y = 9
5x + 3y = 21

Nothing - it is ready to go.
Multiply one equation by -1
Multiply the top equation by 3.
Multiply the bottom equation by 7.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is NOT a method to solve systems?

Elimination
Distribution
Substitution
Graphing

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

9x-3y=-3

-5x+3y=-1

Which variable will be eliminated?

the x

the y

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

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