Thinking Mathematically (6th Edition)

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

Chapter 1 - Problem Solving and Critical Thinking - 1.3 Problem Solving - Exercise Set 1.3: 6

Answer

The unnecessary information in the problem is the weight of the tires. Amount left = 72.

Work Step by Step

Total amount before spending = 250 No. of tires to be purchased = 4 Cost of each tire including tax = 42 + 2.50 = 44.50 So, to find out money left after buying four tires, we don't need the information about the weight of each tire. amount spent in buying 4 tires = 4 x 44.50 = 178 Amount left = 250 - 178 = 72
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