Suppose that the functions r and s are defined for all real numbers x as foil r(x)=3x-4 s(x) = 5x Write the expressions for (r+s) (x) and (r-s) (x) and evaluate (r.s) (2). (r + s) (x) = [] (r-s)(x) = [ (r.s) (2) = [ X 3