Suppose that the functions r and s are defined for all real numbers x as follows. r(x) =x+5 s (x) =4x+1 Write the expressions for (r+s) (x) and (r's) (x) and evaluate (r-s) (2). ( rt s) (x) = 1 (1.5) (x ) = 1 X (r - s) (2 ) = 1