Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 1 - Expressions, Equations, and Inequalities - Cumulative Standards Review - Multiple Choice - Page 56: 17


$24$ inches long

Work Step by Step

You have the expression $21+0.5n$ which is the length in inches. $n$ is the age of a baby in months. Plug in $6$ for $n$ because you have to find the length of the baby after $6$ months: $=21+0.5n \\=21+0.5(6) \\=21+3 \\=24$ After $6$ months a baby would be $24$ inches long.
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