College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 1 - Equations and Inequalities - Exercise Set 1.3 - Page 136: 76


Samantha has $8$ roses.

Work Step by Step

Let $m$ denote the number of roses Mary has, $j$ denote the number of roses Jack has, $s$ denote the number of roses Samantha has. We know that $m=5,j=7$ and that $m+j+s=20$. Thus: $m+j+s=20\\5+7+s=20\\12+s=20\\12+s-12=20-12\\s=8$ Thus Samantha has $8$ roses.
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