Algebra 1: Common Core (15th Edition)

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

Chapter 4 - An Introduction to Functions - 4-6 Formalizing Relations and Functions - Practice and Problem-Solving Exercises - Page 273: 42


Nick needs 3 dollars.

Work Step by Step

To solve this, we can say that Andrew needs x dollars, so A=x. Since Scott needs two more dollars than Andrew, then S=x+2. Since Nick needs half as much as Andrew, then N=$\frac{1}{2}$x. Adding A+S+N=17 as they need 17 dollars so we can solve for x. x+(x+2)+$\frac{1}{2}$x=17 2x+$\frac{1}{2}$x=17-2 $\frac{5}{2}$x=15 5x=30 x=6 So;1 $\frac{1}{2}$x=$\frac{1}{2}$(6)=3 Therefore Nick needs $3.
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