Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 8 - Polynomials and Factoring - 8-5 Factoring x2+bx+c - Practice and Problem-Solving Exercises - Page 517: 64

Answer

Hence, the speed of the friend is faster.

Work Step by Step

$\Rightarrow 1\;mi/h=1.46667\;ft/s$ Multiply the equation by $7$. $\Rightarrow 7\;mi/h=10.2667\;ft/s$. The friend's speed is $11\;ft/s$. Hence, the speed of the friend is faster.
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