Plz help me

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.

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2

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