Algebra 1

by Hall, Prentice

Published by Prentice Hall

ISBN 10: 0133500403

ISBN 13: 978-0-13350-040-0

Chapter 11 - Rational Expressions and Functions - 11-5 Solving Rational Equations - Practice and Problem-Solving Exercises - Page 685: 50

Answer

23.5 minutes

Work Step by Step

Mike takes 75 minutes, Joan takes 60 minutes, Kyle takes 80 minutes $x/75 + x/60 + x/80 = 1$ $3600*(x/75 + x/60 + x/80 = 1)$ $3600x/75 + 3600x/60 + 3600x/80 = 3600$ $48x + 60x+45x = 3600$ $153x = 3600$ $153x/153 = 3600/153$ $x = 23.5$

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