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Algebra II Workbook - Wayne County Public Schools

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LESSON<br />

1.7<br />

CONTINUED<br />

EXAMPLE 4<br />

NAME _________________________________________________________ DATE ____________<br />

Practice with Examples<br />

For use with pages 50–56<br />

Writing an Absolute Value Model<br />

The tolerance when machining a certain piece of steel is 0.0005 inch.<br />

One piece of steel is supposed to be 5.25 inches. Write an absolute value<br />

inequality that describes the acceptable lengths for the piece of steel.<br />

SOLUTION<br />

Verbal<br />

<br />

Model<br />

Labels Actual length l<br />

(inches)<br />

<strong>Algebra</strong>ic<br />

Model<br />

Actual<br />

length<br />

Ideal length 5.25<br />

Tolerance 0.0005<br />

l 5.25 ≤ 0.0005<br />

Exercises for Example 4<br />

<br />

Ideal<br />

length<br />

Tolerance<br />

(inches)<br />

(inch)<br />

10. The average height range of a golden retriever is 20–24 inches. Write<br />

the average height range as an absolute value inequality.<br />

<br />

≤<br />

Chapter 1<br />

11. The average life span for a horse is 20 to 40 years. Write the average<br />

life span as an absolute value inequality.<br />

Copyright © McDougal Littell Inc.<br />

All rights reserved.<br />

<strong>Algebra</strong> 2 21<br />

Practice <strong>Workbook</strong> with Examples

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