Algebra: A Combined Approach (4th Edition)

by Martin-Gay, Elayn

Published by Pearson

ISBN 10: 0321726391

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

Chapter 10 - Section 10.3 - Simplifying Radical Expressions - Exercise Set - Page 704: 77

Answer

$5$

Work Step by Step

The distance formula is: $d = \sqrt{(y_2-y_1)^2+(x_2-x_1)^2}$. This finds the distance $d$ between two points $(x_1,y_1)$ and $(x_2,y_2)$. Distances are always positive. $d = \sqrt{(5-1)^2+(8-5)^2} = \sqrt{25} = 5$

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