Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10:
ISBN 13:

Chapter 3 - Adding and Subtracting Fractions - 3.3 Adding and Subtracting Unlike Fractions - 3.3 Exercises - Page 221: 41

Answer

The length of the screw is $\frac{31}{40}$ inches.

Work Step by Step

$\frac{1}{8} + \frac{1}{4}+ \frac{2}{5}$ Find the LCM. 8 = 2 x 2 x 2 4 = 2 x 2 5 = 5 LCM = 2 x 2 x 2 x 5 = 40 Express as like fractions using LCM of 40, add $\frac{5}{40} + \frac{10}{40}+ \frac{16}{40}$ = $\frac{31}{40}$
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