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 - Concept and Vocabulary Check - Page 373: 3


Fill the blank with $4.00+0.15x$

Work Step by Step

The monthly cost consists of two parts: * the cost based on the number of messages, ** the fixed cost, regardless of the number of messages. The sum of the two is the total cost. So, total monthly cost equals (number of messages)$\times$(cost of one)+ (fixed cost) which we write as $x\cdot 0.15+4.00$ or $4.00+0.15x$ Fill the blank with $4.00+0.15x$
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