Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 3 - Introduction to Graphing - 3.6 Slope-Intercept Form - 3.6 Exercise Set - Page 210: 83


Her balance at the beginning of the month was $\$2400$.

Work Step by Step

Let $x$ = her balance at the beginning of the month Her college savings grew 15 percent. This means that her saving's balance increased by $0.15x$. Thus, $x+0.15x=\$2760 \\1.15x=2760 \\\frac{1.15x}{1.15}=\frac{2760}{1.15} \\x=\$2400$
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