Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 1 - Introduction to Algebraic Expressions - 1.1 Introduction to Algebra - 1.1 Exercise Set: 91

Answer

Ellie's race time is $8+t$.

Work Step by Step

Ellie's race time is 5 seconds longer than Dion's, so $e=5+d$ Dion's race time is 3 seconds longer than Molly's and Molly's race time is $t$, so $d=3+t$ Substitute for $d$ to find Ellie's race time in terms of $t$. $e=5+d=5+3+t=8+t$
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