Suppose that the functions r and s are defined for all real numbers x as follows. r (x) =3x+2 s (x) = 6x Write the expressions for (r's ) (x) and (r +s) (x) and evaluate (r -s) (1). (r.s) (x) = 1 ( r + s ) ( x ) = 1 + X ? (r - s) (1) = 0