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Substitute and Solve Equations

Authored by Anthony Clark

Mathematics

9th Grade

CCSS covered

Substitute and Solve Equations
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14 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

When solving a system of equations algebraically, which statement results in infinite solutions?

4 = 7

2 = 2

-3 = 3

all of the above

Answer explanation

You will be left with an identity (something true) when trying to solve a system of equations, if there are infinitely many solutions.

Tags

CCSS.8.EE.C.8B

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

What is the solution to the system?

(3, -1)

(2, -6)

No Solution 

(6, -2)

Tags

CCSS.8.EE.C.8B

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Solve for x and y
y = 2x + 1
y = 4x - 1

(1,3)

(-1,-3)

(-1,3)

(3,1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Solve the system given:
3x - y = 7
2x + y = 3

(-1,2)

(5,4)

(4,5)

(2,-1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the first step in solving a system by Substitution?

Make sure both equations are in standard form.

Make sure at least one equation is solved for one variable.

Make sure both equations are in slope-intercept form.

Make sure both equations can be solved.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The first step in solving using the substitution method is __________.

get x by itself

get y by itself

get either variable by itself

add the equations together

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which is the best method to use?


y = 6x − 11

−2x − 3y = −7

Graphing

Substitution because a variable is isolated.

Elimination because both equations are in standard form.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

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