Answer
$n = 6$
Work Step by Step
Put the proportion in fraction form: $\frac{4}{n} = \frac{n}{9}$
Cross-multiply: $4*9 = n*n, 36 = n^2, n = 6$
Algebra 2 Common Core
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133186024
ISBN 13:
978-0-13318-602-4
Skills Handbook - Ratios and Proportions - Exercises - Page 974: 15
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