Let v=(2, 8) and w=(-1, -4) which of the following is true? check all that apply a.) v*w= -34 b.) v and w are perpendicular c.) v=-2w d.) the x- component of v is 2

A) Assuming V*W means the dot-product of V and W, this is TRUE.
.. 2*(-1) +8*(-4) = -2 -32 = -34

B) The dot-product is shown to be non-zero, so the vectors are NOT perpendicular. B is FALSE.

C) -2W = (2, 8) = V, so this is TRUE.

D) If you call the components (x, y), then the first (x) component of V is 2, TRUE.