Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 3 - Section 3.4 - Linear Equations in One Variable and Problem Solving - Exercise Set - Page 198: 38


The top speed of the Indy car is 235 mph.. The top speed of NHRA car is 330 mph.

Work Step by Step

Let $i$ be the top speed of the Indy car. The top speed of NHRA car is $i+95$. $i+(i+95)=565$ $\longrightarrow$combine like terms $2i+95=565$ $\longrightarrow$addition property $2i+95-95=565-95$ $\longrightarrow$simplify $2i=470$ $\longrightarrow$multiplication property $2i\div2=470\div2$ $\longrightarrow$simplify $i=235$ $i+95=235+95=330$
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