Basic College Mathematics (10th Edition)

Published by Pearson

Chapter 3 - Adding and Subtracting Fractions - 3.4 Adding and Subtracting Mixed Numbers - 3.4 Exercises - Page 232: 74

Answer

Estimate=29 hours Exact=28$\frac{1}{2}$ hours

Work Step by Step

Estimate: 7$\frac{3}{4}$$\approx8 5\frac{1}{4}$$\approx$5 6$\frac{1}{2}$$\approx$7 9$\approx$9 8+5+7+9=29 Exact: 7$\frac{3}{4}$+5$\frac{1}{4}$+6$\frac{1}{2}$+9 7$\frac{3}{4}$+5$\frac{1}{4}$+6$\frac{2}{4}$+9 27$\frac{6}{4}$ 28$\frac{1}{2}$

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