Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 3 - Solving Inequalities - 3-6 Compound Inequalities - Practice and Problem-Solving Exercises: 48

Answer

The spring is stretched between 20 and 32 inches.

Work Step by Step

Write an equation for d. $\frac{d}{F}=0.8\longrightarrow$ multiply each side by F $\frac{d}{F} \times F=0.8F\longrightarrow$ multiply $d=0.8F$ Substitute the upper and lower quantities for F to find the range for d. $0.8(25)\leq d\leq0.8(40)\longrightarrow$ multiply $20\leq d \leq32$
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