Two vectors are given by a = 7.4 x - 6.9 y and b = -18.8 x + 7.9 y. 1) What is the magnitude of a? 2) What is the angle between vector b and the positive x-axis? 3) What is the magnitude of the vector a + b? I Have NO CLUE How to Even APPROACH this Problem. It's killin' me too cuz it looks SO EASY.. I was thinkin of trying to solve for a by the substitution method of solving a simultaneous equation..but then I'd be left with an answer with a variable in it..(?)..I'm really growing to hate physics with a passion!