Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 10 - Radical Expressions and Equations - 10-4 Solving Radical Equations - Practice and Problem-Solving Exercises - Page 624: 39


$AD=25$ $DB=11.25$

Work Step by Step

$Given,$ $CD=\sqrt (AD)(DB)$ $a]$ $10=\sqrt (AD)(4)$ Squaring, $100=4(AD)$ $AD=\frac{100}{4}=25$ $b]$ $15=\sqrt (20)(DB)$ Squaring, $225=20(DB)$ $DB=\frac{225}{20}=11.25$
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