Can anyone help please

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number t of tokens james has is a function of g, the number of games he plays. write the function’s formula? t=

Which function has the domain x> -11?