Answer
$25$ students
Work Step by Step
$(.8)(.8)(.75)(.75)(x)=9$
$.36x=9$
$\frac{.36x}{.36}=\frac{9}{.36}$
$x=25$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 2 - Solving Equations - 2-9 Percents - Practice and Problem-Solving Exercises - Page 143: 53
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