Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 6 - Systems of Equations and Inequalities - Chapter Test - Page 407: 15

Answer

$.3x+.5y=.42$ $x+y=200$ 80 liters of 30% and 120 liters of 50%

Work Step by Step

$x$ for 30% insecticide, $y$ for 50% insecticide $.3x+.5y=.42*200$ $x+y=200$ $x+y=200$ $x=200-y$ $.3(200-y)+.5y=.42*200$ $60 -.3y+.5y = 84$ $60+.2y=84$ $.2y=24$ $y=120$ $x+y=200$ $x+120=200$ $x = 80$
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