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Absolute Value Equations and Inequalities (A1 1-7)

Absolute Value Equations and Inequalities (A1 1-7)

Assessment

Presentation

•

Mathematics

•

8th - 10th Grade

•

Medium

•
CCSS
6.EE.B.8, 6.EE.B.5

Standards-aligned

Created by

Erica Nafziger

Used 12+ times

FREE Resource

11 Slides • 24 Questions

1

Absolute Value Equations and Inequalities
(A1 1-7)

by Erica Nafziger

2

​Essential Question

​Why does the solution for an absolute value equation or inequality typically result in a pair of equations or inequalities?

3

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4

Absolute Value ​EQUATIONS

​

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6

Multiple Select

What is the first step in solving this absolute value equation? 

∣x+5∣=12|x+5|=12  

1

|x+5| = 12

Set the absolute value equal to 12 

2

x+5 = 12

Set the expression inside the absolute value equal to 12

3

|x+5| = -12

Set the absolute value equal to -12 

4

x+5 = -12

Set the expression inside the absolute value equal to -12

7

Multiple Choice

After we set the expression equal to 12 and -12, what is the second step? 

 |x+5|=12

x+5= 12   or   x+5=−12x+5=\ 12\ \ \ or\ \ \ x+5=-12  

1

Add 5 to both sides

2

Divide both sides by 5

3

Subtract 12 from both sides

4

Subtract 5 from both sides

5

Add 12 to both sides

8

Multiple Select

What are the two solutions for x?  

x+5= 12   or   x+5=−12x+5=\ 12\ \ \ or\ \ \ x+5=-12  

1

x = 7

2

x = -17

3

x = -7

4

x = 17

9

Multiple Choice

What is the first step in solving this absolute value equation? 

4∣x+8∣=364\left|x+8\right|=36  

1

add 4 to both sides

2

subtract 6 from both sides

3

divide by 4 on both sides

4

add 6 to both sides

10

Multiple Select

After we isolate the absolute value, what do we do next? 

(4∣x+6∣)4​=364\frac{\left(4∣x+6∣\right)}{4}​=\frac{36}{4} ----->   ​∣x + 6∣=9​\left|x\ +\ 6\right|=9  

1

|x+6| = 9

set the absolute value equal to 9

2

x+6 = 9

set the  expression inside the absolute value equal to 9

3

|x+6| = -9

set the absolute value equal to -9

4

x+6 = -9

set the  expression inside the absolute value equal to -9

11

Multiple Select

What are the two solutions for x? 

  ​∣x + 6∣=9​\left|x\ +\ 6\right|=9  -----> x+6=9   and   x+6=−9x+6=9\ \ \ and\ \ \ x+6=-9  

1

x = 3

2

x = -15

3

x = -3

4

x = 15

12

​Absolute Value INEQUALITIES

​

13

Multiple Choice

Which symbol means less than?

1

<<  

2

>>  

3

≤\le  

4

≥\ge  

14

Multiple Choice

Which symbol means greater than or equal to?

1

<<  

2

>>  

3

≤\le  

4

≥\ge  

15

Fill in the Blanks

Type the correct inequality that would make the statement true.

hint: type in < or >

10 ? 4

Type answer...

16

Fill in the Blanks

Type the correct inequality that would make the statement true.

hint: type in < or >

-7 ? -2

Type answer...

17

​Greater than (>)

​&

Greater than equal to (>)

​

*Remember GREAT "OR"

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18

​Less than ( <)

​&

Less than equal to ( <)

​

*Remember LESS "AND"

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19

Multiple Choice

Would this absolute value equation be an "AND" or "OR"?  ∣x−5∣≤2\left|x-5\right|\le2  

1

AND

2

OR

20

Multiple Choice

Would this absolute value equation be an "AND" or "OR"? 

∣−4x+7∣≥3\left|-4x+7\right|\ge3  

1

AND

2

OR

21

Multiple Choice

Would this absolute value equation be an "AND" or "OR"? 

∣3x+1∣<7∣3x+1∣<7  

1

AND

2

OR

22

Multiple Select

Which of the following absolute value inequalities would be an "OR"?

(CHOOSE ALL THAT APPLY)

1

∣4x−1∣>5\left|4x-1\right|>5  

2

∣5x+12∣​≥1∣5x+\frac{1}{2}∣​\ge1  

3

∣7x+5∣>6∣7x+5∣>6  

4

∣−3x+7∣<11\left|-3x+7\right|<11  

5

∣2x−10∣≤50∣2x−10∣\le50  

23

Multiple Select

Which of the following absolute value inequalities would be an "AND"?

(CHOOSE ALL THAT APPLY)

1

∣4x−1∣>5\left|4x-1\right|>5  

2

∣5x+12∣​≥1∣5x+\frac{1}{2}∣​\ge1  

3

∣7x+5∣>6∣7x+5∣>6  

4

∣−3x+7∣<11\left|-3x+7\right|<11  

5

∣2x−10∣≤50∣2x−10∣\le50  

24

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25

Multiple Choice

Is this absolute value inequality going to be an "AND" or an "OR"?

  ∣x+6∣<2∣x+6∣<2  

1

AND

2

OR

26

Multiple Select

Which two inequalities below would be the next step in solving 

  ∣x+6∣<2∣x+6∣<2  

1

x+6<−2x+6<−2  

2

x+6<2x+6<2  

3

x+6=2x+6=2  

4

x+6>−2x+6>-2  

5

x+6>2x+6>2  

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28

Multiple Choice

Solve the absolute value inequality.

  ∣2x−1∣<3∣2x−1∣<3  

1

x<−1 or x>2x<−1\ or\ x>2  

2

−1<x<2−1<x<2  

3

1<x<21<x<2  

4

−1>x>2−1>x>2  

29

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30

Multiple Choice

Is this absolute value inequality going to be an "AND" or an "OR"?

  9∣x+4∣+10≤559∣x+4∣+10\le55  

1

AND

2

OR

31

Open Ended

What would be the first step to isolate the absolute value?

  9∣x+4∣+10≤559∣x+4∣+10\le55  

32

Multiple Choice

What would be the next step to isolate the absolute value? 

  9∣x+4∣≤459∣x+4∣\le45  

1

Divide by 9

2

Subtract 4

3

Add 9

4

Multiply by 9

33

Multiple Select

Which two inequalities below would be the next step? Click two below

  ∣x+4∣≤5∣x+4∣\le5  

1

x+4≤−5x+4\le−5  

2

x+4≤5x+4\le5  

3

x+4≥5x+4\ge5  

4

x+4≥−5x+4\ge−5  

34

Multiple Choice

Solve the absolute value inequality.

6∣x+3∣−10≥−46\left|x+3\right|-10\ge-4  

1

x≤−4 or x≥−2x\le−4\ or\ x\ge−2  

2

−2<x<4-2<x<4  

3

−4<x<−2−4<x<−2  

4

x≤−4 or x≥2x\le−4\ or\ x\ge2  

35

Open Ended

Write in your own words the steps to solve absolute value inequalities.

pattern-tertiary
Absolute Value Equations and Inequalities
(A1 1-7)

by Erica Nafziger

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