Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 4 Quadratic Functions and Factoring - 4.1 Graph Quadratic Functions in Standard Form - 4.1 Exercises - Mixed Review - Page 243: 74

Answer

See below

Work Step by Step

If we drive from 9am to 2pm, it means the total time you have driven is $5$ hours. The total distance is $340-70=270$ miles. Hence, the average speed is $v=\frac{s}{t}=\frac{270}{5}=54$ miles/hour.
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