Factorize 36/4 x^2 - y^2/25 plz help

Lorenzo ate 2/5 of his bag of almonds. his 4 friends ate equal shares of the remaining bag of almonds?

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

Thelime contains the point(-3,0) and parallel x-3y=3( show all work)