Pls help I’m so... lost

Which of those sequences is a geometric sequence

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.