Respuesta :

Answer:

x+21

Step-by-step explanation:

g(x) = x - 12 and h(x) = 2x + 9,

h(x) – g(x) =​  2x+9 - (x-12)

Distribute the minus sign

                 = 2x+9-x+12

 Combine like terms

                 = x +21

Answer:

x+21 that the answer bro