Answer
$3u·v=-54$
Work Step by Step
$3u·v=3⟨-4,2⟩⋅⟨5,1⟩=⟨3(-4),3(2)⟩⋅⟨5,1⟩=⟨-12,6⟩⋅⟨5,1⟩=-12(5)+6(1)=-60+6=-54$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 8 - Review Exercises - Page 617: 74
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