Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 6 - Algebra: Equations and Inequalities - 6.3 Applications of Linear Equations - Exercise Set 6.3 - Page 375: 31


30 times

Work Step by Step

Consider the equation for the condition at which the bus fare with discount pass is equal to the bus fare without discount $1.25x=15+0.75x$ Here, x is the number of times in a month the bus must be used Now, solve the above equation $\begin{align} & 1.25x=15+0.75x \\ & 1.25x-0.75x=15 \\ & 0.5x=15 \\ & x=30 \end{align}$ Thus, the number of times the bus must be used in a month is 30.
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