For u=(2,1), v=(3,-1) find 3u-v and the magnitude of 3u-v

Marlow is comparing the prices of two trucks rental compaines company a charges $3 per hour and an addtional $75 as serivce charges company b charges $2 per hour and an additional $85 as serivce charges

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0