Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 7 - Section 7.6 - Vectors: The Dot Product - 7.6 Problem Set: 21

Answer

$-134$

Work Step by Step

Since $\textbf {u}=\langle -11,7 \rangle$ and $\textbf {v}=\langle 9,-5 \rangle$, ${\textbf {u}\cdot\textbf {v}}=-11(9)+7(-5)=-99-35=-134$.
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