Question

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

v ⋅ w

Answer 1

is it just 18,-36,49

Answer 2

Have you considered simply calculating the dot product? Multiply, element-by-element, and add up the results.

Answer 3

Add them up. A dot-product (inner-product) is a scalar value. It is no longer a vector.

Answer 4

<-27, 28, 56>

<18, -36, 49>

18

31
these are my choices though

Answer 5

@tkhunny

Answer 6

Well, it's a scalar. This discards the first two. Add up your three correct values. You'll have it!