College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter P, Prerequisites - Chapter P Review - Exercises - Page 76: 10


(a) $-\frac{1}{30}$ (b) $\frac{43}{30}$

Work Step by Step

We find common denominators and reduce: (a) $\displaystyle \frac{7}{10}-\frac{11}{15}=\frac{21}{30}-\frac{22}{30}=-\frac{1}{30}$ (b) $\displaystyle \frac{7}{10}+\frac{11}{15}=\frac{21}{30}+\frac{22}{30}=\frac{43}{30}$
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