#### Answer

$\sqrt {5}$

#### Work Step by Step

$\frac{\sqrt {45}}{10}+\frac{7\sqrt {5}}{10}$ Factor.
$\frac{\sqrt {9}\sqrt {5}}{10}+\frac{7\sqrt {5}}{10}$ Simplify and add.
$\frac{10\sqrt {5}}{10}$ Simplify.
$\sqrt {5}$

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

$\sqrt {5}$

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