Thinking Mathematically (6th Edition)

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

Chapter 5 - Number Theory and the Real Number System - 5.2 The Integers; Order of Operations - Exercise Set 5.2: 119

Answer

Feeling frequently stressed and having less than 12 years of education will shrink one's life span by $11$ years.

Work Step by Step

Feeling frequently stressed shrinks one's life span by 5 years. The number represents this is $-5$. Having less than 12 years of education shrinks one's life span by 6 years. The number that represents this is $-6$. The final effect on one's life span in doing the two can be found by adding the two numbers together: Effect on one's life span $=-5 + (-6) = -11$ Thus, feeling frequently stressed and having less than 12 years of equation will shrink one's life span by $11$ years.
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