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Substitute One Variable

Authored by Anthony Clark

Mathematics

9th Grade

CCSS covered

Substitute One Variable
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20 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Evaluate the expression: x + 2 when x = 6

8

4

12

10

Tags

CCSS.6.EE.A.2C

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the first step to solve a system with substitution?

Substitute the values found from the previous step into one of the original equations and solve for the remaining variable

Solve the linear system for both its variables

Solve one equation for one of its variables

Substitute the expression from the previous step in the other two equations to obtain a linear system in two variables

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the final step to solve a system with substitution?

Substitute the values found from the previous step into one of the original equations and solve for the remaining variable

Solve the linear system for both its variables

Solve one equation for one of its variables

Solve one equation for one of its variables

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Solve for x and y using the substitution method.

5x + 3y = 7

y = 4

(4,1)

(4,-1)

(1,4)

(-1,4)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

5.

FILL IN THE BLANK QUESTION

1 min • 1 pt

If x = -3, in the equation -2x + y = 15, what is y? Type in the number.

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which choice shows substitution correctly?


3x - y = 10

y = -6x + 3

3x - (-6x +3) = 10

3(-6x + 3) - y = 10

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

7.

DROPDOWN QUESTION

1 min • 1 pt

Find the value of (x, y) that satisfies the equations by solving the system using substitution.
 

5x + 4y= −14
y =  −7x  −  15 
The solution is (a)   .

(-2, -1)

(0, 0)

(1, 1)

(2, 2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

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