Answer
False.
Work Step by Step
Rewrite $1$ as $\frac{z}{z}$ to get $$\frac{y}{y+z}=\frac{z}{z}+\frac{y}{z}$$ $$\frac{y}{y+z}=\frac{y+z}{z}$$ This is not correct, so the statement is false.
Functions Modeling Change: A Preparation for Calculus, 5th Edition
by Connally, Eric; Hughes-Hallett, Deborah; Gleason, Andrew M.; Cheifetz, Phil C.
Published by
Wiley
ISBN 10:
1118583191
ISBN 13:
978-1-11858-319-7
Chapter 11 - Polynomial and Rational Functions - Exercises to Skills Review for Chapter 11 - Page 494: 55
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