Pre calculus question

Mathematics
Tutor: None Selected Time limit: 1 Day

Find the indicated dot product. (1 point)

r = <9, -7, -8>, v = <3, 4, 7>, w = <6, -9, 7>

v w
<18, -36, 49>
18
31











Feb 26th, 2015

v = <3, 4, 7>, w = <6, -9, 7>

 w

Definition of dot product in 3 dimensions: a · b = ax × bx + ay × by + az × bz

 w = 3*6 + 4*-9 + 7*7
 w = 18 - 36 + 49
 w = 31  (C)
Please best answer.
Feb 26th, 2015

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