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Solving systems of equations

Authored by Jarica Williams

Mathematics

8th Grade

CCSS covered

Solving systems of equations
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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

45 sec • 5 pts

2x - 6y = 20

2x + 5y = -11


what would the top equation become when you multiply everything by -1?

2x - 6y = 20

-2x - 6y = -20

-2x + 6y = 20

-2x + 6y = -20

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

2.

MULTIPLE CHOICE QUESTION

3 mins • 5 pts

4x +  8y = 20
-4x + 2y = -30
Which variable will be eliminated?

The  x
The  y
The  z
The unknown

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

3.

MULTIPLE CHOICE QUESTION

15 mins • 5 pts

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

4.

MULTIPLE CHOICE QUESTION

20 sec • 5 pts

what is the variable that willl be "eliminated"?


5x - 4y = 11

5x + 4y = -14

x variable

y variables

both variables

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

5.

MULTIPLE CHOICE QUESTION

45 sec • 5 pts

what is the resulting combined equation to the following system:


5x - 4y = 11

5x + 4y = -14

5x = -3

10y = -3

10x = -3

10x = -25

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

6.

MULTIPLE CHOICE QUESTION

45 sec • 5 pts

what is the resulting combined equation for the system below?


9x + y = 12

-9x + y = 6

-18x = 18

y = 18

2y= 18

18x + 2y = 18

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

7.

MULTIPLE CHOICE QUESTION

15 mins • 5 pts

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

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