Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 8 Rational Functions - 8.1 Model Inverse and Joint Variation - 8.1 Exercises - Skill Practice - Page 555: 26


$z=-400, z=20xy$

Work Step by Step

We have to plug in our values to the formula to $axy=z$ That yields, $-0.25*-3*a=15$ or the equation is $a=20$ Plugging in $x=-4, y=5$, $-4*5*20=z$ or $z=-400$
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