Question

Let v=(5 -2) and w=(-10 4). which of the following is true
A.w=-2v
B.The y-component of w is 4
C.v*w=-58
D.v and w are perpendicular?

Answer 1

v and w are vectors right <a,b>

Answer 2

one property is:
A vector times a scalar is a vector...

\[W=c*<a , b> = <ca , cb>\]

Answer 3

A) Test if:

W = (-2) * <5 , -2>

Answer 4

This look familiar ?

Answer 5

yeah

Answer 6

im still confused though

Answer 7

@DanJS