If f(x) = 2х +6 and g(x) = -8х, what is g(f(4))?

Can someone me with these two circle theorem questions asap?

A. what does the point (4, 122) represent? b. what is the unit rate? c. what is the cost of buying 10 tickets?

20.ju inces. which ordered pair is a viable solution if x represents the number of books he orders and y represents the total weight of the books, in ounces? (-3,-18) (-0.5, -3) (0,0) (0.5, 3)