I failed my quiz ;( i need help

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?

Identify the parent function that can be used to graph the function f(x)=3(x-9)2

Y+ 2/y is it a polynomial in one variable or not? and if so, why?