Suppose that the functions s and t are defined for all real numbers x as follows. s (x) =6x t (x) =2x+5 Write the expressions for (s.t) (x) and (s + t) (x) and evaluate (s -t) (1). ( s. t) (x) = 0 ( s + + ) ( x ) = 1 X U (s - 1 ) ( 1 ) = 0