Algebra 1

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

Chapter 6 - Systems of Equations and Inequalities - 6-3 Solving Systems Using Elimination - Standardized Test Prep - Page 380: 49


390 minutes

Work Step by Step

We are given the distance (d) of the race course as 65 miles. We are given the rate or speed (r) as 10 mi/h. We need to find time (t). We can use the formula d=rt to find the time. Lets substitute the variables into this equation. 65=10$\times$t (Divide both sides by 10) 6.5 hours = t It asks us to find the time in minutes. We know that 1 hour = 60 minutes so we can multiply our time in hours by 60 to get the time in minutes. 6.5 $\times$ 60 = 390. So our answer is 390 minutes.
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