College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 1 - Equations and Inequalities - Exercise Set 1.7 - Page 198: 124

Answer

The home must be valued at a price $greater$ $than$ $32,000$ $dollars$ for the first tax bill to be a better deal than the second tax bill.

Work Step by Step

To solve this exercise, we must first model the equations for both tax plans: $$Bill_{1} = 1,800 + 0.03V$$ $$Bill_{2} = 200 + 0.08V$$ where $V$ represents the value of the homes. Since we're interested in the amount of value that makes the first bill a better deal (i.e., $Bill_{1}$ is less than $Bill_{2}$), we can write this in the following manner: $$Bill_{1} \lt Bill_{2}$$ $$1,800 + 0.03V \lt 200 + 0.08V$$ where by solving for V: $$1,800 - 200 \lt 0.08V - 0.03V$$ $$1,600 \lt 0.05V$$ $$32,000 \lt V$$ Which means that the home must be valued at a price greater than 32,000 dollars for the first tax bill to be a better deal than the second tax bill.
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