Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 1 - Foundations for Algebra - 1-7 The Distributive Property - Practice and Problem-Solving Exercises: 68

Answer

20: 144 bpm 50: 120 bpm

Work Step by Step

$0.8(200-y)\longrightarrow$ multiply using the distributive property =$0.8(200)-0.8y\longrightarrow$ simplify =$160-0.8y$ Substitute the age for a 20 year old. $160-0.8(20)=160-16=144$ Substitute the age for a 50 year old. $160-0.8(50)=160-40=120$
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