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Let u = 2i + 3j, v = –i, and w = 5i – 6j. What is the magnitude of 2(u – v + w)? 10.0 13.4 17.1 21.6
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3 votes
Let u = 2i + 3j, v = –i, and w = 5i – 6j. What is the magnitude of 2(u – v + w)?

10.0
13.4
17.1
21.6

User Taha Sami
by
3.1k points

2 Answers

2 votes
2(u-v + w)

2u - 2v + 2w

(4i+3j) - (-2i) + (10i - 12j)

4i + 2i + 10i = 16i
3j - 0j -12j = -8j

16 - 8j

magnitude = √( 16²+(-8)² ) = 17.1
User Phil M Jones
by
2.8k points
0 votes

Answer:

C. 17.1

Explanation:

edge

User Mekk
by
3.3k points
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