vector A = 7i + 4J vector B= -4i - 8j vector F = vector A - 3B are you allowed to do this: Fx= Ax - 3Bx : 7-3(-4) =19 Fy= Ay -3By : 4- 3(-8) = 28 or is there some rule to get the 3b? and then how do you get the direction? when i do tan^-1 (28/19) = 55.8 . but how can i tell what quadrant vector F is in? i know vector A is in quad 1. and B is in quad 3. but since i am subtracting vector B, it is really going in quad 1? so is vector F really in quad 1? sorry for all the questions!!