Question

let v=(8, -4) and w=(-4, 2). which of the following is true? (there can be more than 1 answer)
A) v=2w
B) the x component of v is 4
C) the y component of w is 2
D) v*w=40

Answer 1

Only C is true.

Answer 2

thanks

Answer 3

going by complex numbers we get both A and C true