Algebra 1

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

Chapter 9 - Quadratic Functions and Equations - 9-8 Systems of Linear and Quadratic Equations - Mixed Review: 48

Answer

$9$

Work Step by Step

$\sqrt {81}$ According to the textbook, a number, $a$, is a square root of another number, $b$, if $a^2=b$. Since $(9)^2=81$, $9$ is a square root of $81$.
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