## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson

# Chapter 7 - Functions and Graphs - 7.5 Formulas, Applications, and Variation - 7.5 Exercise Set - Page 485: 13

#### Answer

$d=\frac{l}{f}$

#### Work Step by Step

Multiply $d$ to both sides of the equation: $d \cdot f=d \cdot \frac{l}{d} \\df = l$ Divide $f$ to both sides of the equation: $\frac{df}{f}=\frac{l}{f} \\d=\frac{l}{f}$

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