Question

evaluate the dot product of (8,4) and (-3,5)

Answer 1

8*(-3)+4*5

Answer 2

-4?

Answer 3

Zarkon, it would have been helpful to post a general formula for finding the dot product of two points.

Answer 4

-100

Answer 5

\[\vec{a}\cdot \vec{b}=\sum_{i=1}^{n}\left[a_i\times b_i\right]\]

Answer 6

lost?

Answer 7

yes the answer is -4

Answer 8

ok ok

Answer 9

let A= a1i+a2j+a3k
B= b1i+b2j+b3k
A.B=a1b1+a2b2+a3b3

Answer 10

i like the old zarkon avatar