Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 7 - Section 7.6 - Proportions and Problem Solving with Rational Equations - Exercise Set: 45


Required amount of water : 9 gallons

Work Step by Step

( Note x:y is same as $\frac{x}{y}$) Given: 8 teaspoons of weed killer are to mixed with 2 gallons of water Thus ratio of weed killer to water = 8:2 = 4:1 If there are 36 teaspoons of weed killer, and 'x' gallons of water, Then the ratio should be 4:1 Thus $\frac{36}{x}$ = $\frac{4}{1}$ Thus x = $\frac{36}{4}$ = 9 So 9 gallons of water are needed.
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