Answer
slower car: 52 mph, faster car: 60 mph
Work Step by Step
slower car: r * 2.5
faster car: (r+8)*2.5
$r*2.5 + (r+8)*2.5 = 280$
$2.5r+2.5r+20=280$
$5r=260$
$5r/5 = 260/5$
$r=52$
$52+8= 60$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 7 - Section 7.6 - Proportions and Problem Solving with Rational Equations - Exercise Set - Page 539: 40
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