Answer
$a=kbc$
Work Step by Step
Because $a$ varies jointly as $b$ and $c$, we equate $a$ to a constant multiple of $b$ and $c$:
$a=kbc$.
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 9 - Section 9.4 - Variation and Problem Solving - Exercise Set - Page 664: 30
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