## Algebra and Trigonometry 10th Edition

Published by Cengage Learning

# Chapter 8 - Review Exercises - Page 618: 93

#### Answer

$W=50$

#### Work Step by Step

Let $u$ be the vector from $P$ to $Q$ $u=(8,9)-(5,3)=(8-5,9-3)=(4,6)$ Now, let's find the dot product of $u$ and $v$: $W=u.v=(4,6)(2,7)=4\times2+6\times7=8+42=50$

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