Answer
12 lessons cost $288.
Work Step by Step
$\frac{528}{22\ lessons} = \frac{x}{12}$
$22x = 528\times12$
$22x = 6336$
$\frac{22x}{22} = \frac{6336}{22}$
$x = 288$
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0134467795
ISBN 13:
978-0-13446-779-5
Chapter 5 - Ratio and Proportion - 5.5 Solving Application Problems with Proportions - 5.5 Exercises - Page 363: 6
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