Algebra 1: Common Core (15th Edition)

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

Chapter 9 - Quadratic Functions and Equations - 9-8 Systems of Linear and Quadratic Equations - Practice and Problem-Solving Exercises - Page 601: 39

Answer

(B) $108\;km/h$.

Work Step by Step

Convert units: $\Rightarrow 1\;m/s=3.6\;km/h$ Multiply both sides by $30$. $\Rightarrow 30\cdot 1\;m/s=30\cdot 3.6\;km/h$ Simplify. $\Rightarrow 30\;m/s=108\;km/h$ Hence, the correct option is (B) $108\;km/h$.
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