Thinking Mathematically (6th Edition)

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

Chapter 7 - Algebra: Graphs, Functions, and Linear Systems - 7.1 Graphing and Functions - Exercise Set 7.1 - Page 418: 41


(a) $h(4)=53$ (b) $h(-1)=8$

Work Step by Step

RECALL: $h(r)$ represents the value of the function $h$ when $r=x$. Replace $r$ with the given value to obtain: (a) $h(4) = 3(4^2) +5 \\h(4)= 3(16)+5 \\h(4)=48+5 \\h(4)=53$ (b) $h(-1) = 3(-1)^2+5 \\h(-1)= 3(1)+5 \\h(-1)=3+5 \\h(-1)=8$
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