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Modeling Absolute Value: Real-World Inequalities for 8th Grade

Authored by Anthony Clark

English, Mathematics

8th Grade

CCSS covered

Modeling Absolute Value: Real-World Inequalities for 8th Grade
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A temperature is recorded as -5 degrees Celsius. If the temperature rises by x degrees, what absolute value equation represents the new temperature being 3 degrees Celsius?

|x| = 3

|x| = 8

|x| = 10

|x| = 5

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A car is traveling at a speed of 60 km/h. If the speed limit is 50 km/h, what absolute value inequality can be used to express how much the car exceeds the speed limit?

|x + 50| > 10

|x - 50| < 10

|x - 60| > 0

|x - 50| > 10

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The distance from a point on a number line to 4 is represented by |x - 4|. If this distance is less than or equal to 3, what inequality represents the possible values of x?

1 ≤ x ≤ 7

x > 7

x < 1

-3 < x < 4

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A student scored 10 points below the average in a math test. If the average score is represented by a variable a, write an absolute value equation to express the student's score.

x = a + 10

x = a - 5

x = a + 5

x = a - 10

Tags

CCSS.HSA.CED.A.3

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A store has a sale where the price of an item can vary by no more than $5 from its original price of $20. Write an absolute value inequality to represent the possible sale prices of the item.

|x - 15| ≤ 5

|x + 20| ≤ 5

|x - 20| ≤ 5

|x - 25| ≤ 5

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The height of a plant is measured to be 15 cm. If the height can vary by 2 cm, write an absolute value equation that models the possible heights of the plant.

|h - 15| ≤ 2

|h - 15| = 2

|h + 15| ≤ 2

|h - 13| ≤ 2

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A runner's time for a race is 30 minutes. If the runner's time can vary by 4 minutes, what absolute value inequality represents the range of possible times for the runner?

|t - 30| ≤ 4

|t + 30| ≤ 4

|t - 34| ≤ 4

|t - 26| < 4

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