Question

Find the indicated dot product.

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

v ⋅ w

Answer 1

v.w = <vx,vy,vz>•<wx,wy,wz> = vx*wx +vy*wy + vz*wz

Answer 2

<-27, 28, 56>
<18, -36, 49>
18
31
these are my answer choices, Is A the correct answer??

Answer 3

\[<3, 4, 7> \cdot <6, -9, 7> = <3 \times 6 + 4 \times -9 + 7 \times 7>\]

Answer 4

Just as irish boy stated.

Answer 5

So its <18+(-36)+49>
simplified down to 31??

Answer 6

Yeah

Answer 7

thanks! :)