Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 6 - Review - Page 461: 48



Work Step by Step

$90^2+x^2=126^2$ $8100+x^2=15876$ $x^2=7776$ $x=\sqrt {7776}$ $\sqrt {7776}\approx 80$ Divide and find the average to approximate the solution. $7776/div80=97.2$ $(80+97.2)\div2=88.6$ Repeat to further refine. $7776\div88.6=87.77$ $(88.6+87.77)\div2=88.19$
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