College Algebra 7th Edition

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

Chapter P, Prerequisites - Chapter P Review - Exercises - Page 78: 129

Answer

See below.

Work Step by Step

Let $x$ be the weight of the raisins, then the weight of the nuts is $50-x$, then our equation is: $3.2x+2.4(50-x)=2.72\cdot50\\3.2x+120-2.4x=136\\0.8x=16\\x=20$ Thus she should use $20$ pounds of raisins and $30$ pounds of nuts.
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