Show work please!

Suppose that the functions r and s are defined for all real numbers x as follows. r(x) =4x+5 s (x) =3x Write the expressions for (r-s) (x) and (r+s) (x) and evaluate (r's) (-1). (r - s) (x) = 0 (rts)(x = X 5 ? (r.s) (-1) = 0