Question

Evaluate the expression:

v ⋅ w

Given the vectors:

r = <5, -5, -2>; v = <2, -8, -8>; w = <-2, 6, -5>

Answer 1

Do you know how to find dot products?

Answer 2

x1x2 + y1y2 + z1z2

Answer 3

Am I supposed to use r though?

Answer 4

Since it says v ⋅ w

Answer 5

No

Answer 6

So just use the formula a⋅b=a1b1+a2b2?

Answer 7

Yes

Answer 8

Wait, how do I do that when I have v1, v2, and v3?

Answer 9

2*-2 + -8*6 + -8*-5

Answer 10

Oh okay! Thank you :D

Answer 11

Go future math professor! You will get this in no time aga3t.