I know the answer is C, but how do I do this problem? Please don't put a fake answer just to get points. I won't be able to do anything about it but karma will catch up to you.

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?

What is the slope of the line shown below?

With both problems. a.s.a.p directions on photo ^