Answer
$20$
Work Step by Step
$\sqrt {400}$
According to the textbook, a number, $a$, is a square root of another number, $b$, if $a^2=b$. Since $(20)^2=400$, $20$ is a square root of $400$.
Algebra 1
by Hall, Prentice
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 - Page 587: 50
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
