College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter P, Prerequisites - Section P.9 - Modeling with Equations - P.9 Exercises - Page 70: 19


$\displaystyle \frac{25}{3+x}$

Work Step by Step

To get the concentration, we divide the amount of salt (25 oz) by the volume of the mixture. The total volume will be the sum of the 3 gallons of brine and $x$ gallons of water: $3+x$ Thus the concentration is: $\displaystyle \frac{25}{3+x}$
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