Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 8 - Review Exercises - Page 618: 93



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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