PLEASE HELP ME I AM CRYING AND I AM HORRIBLE AT MATH I AM SO DUMB

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 tt of tokens james has is a function of gg, the number of games he plays

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.