Answer
6 mph
Work Step by Step
1.5 times as long to go upstream than downstream
72 miles distance
30 mph in still water
$1.5*(30-x)=(30+x)$
$45-1.5x=30+x$
$45-1.5x-30+1.5x=30+x-30+1.5x$
$15=2.5x$
$15/2.5=2.5x/2.5$
$6=x$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 9 - Cumulative Review - Page 600: 17
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