Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 5 - Number Theory and the Real Number System - Chapter Summary, Review, and Test - Review Exercises - Page 335: 53

Answer

$\frac{43}{36}$ or $1\frac{7}{36}$

Work Step by Step

The fractions are not similar, so convert each addend to a fraction using the LCD, which is 36, to find: $=\dfrac{7(4)}{9(4)} +\dfrac{5(3)}{12(3)} \\=\dfrac{28}{36}+\dfrac{15}{36} \\=\dfrac{28+15}{36} \\=\dfrac{43}{36}$
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