Algebra 1: Common Core (15th Edition)

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

Chapter 3 - Solving Inequalities - 3-4 Solving Multi-Step Inequalities - Practice and Problem-Solving Exercises: 44

Answer

33 messages

Work Step by Step

Step 1) .15 x t ... Let t be the total number of text messages sent/received. 15 cents for each text message = .15 cents times t is the total amount spent on text msgs. Step 2) 399.99 + .15t ≤ 45 ... The Basic plan plus money spent on text messages should be less than or at most 45 Step 3) .15t ≤ 5.01 ... Subtract 39.99 from both sides Step 4) t ≤ 5.01 ÷ .15 ... Divide by .15 on both sides to get t alone Step 5) t ≤ 33.4 ... Simplify Step 6) 33 messages ... Rounded final answer
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