Alberto is a waiter. he waits on a table of 4 whose bill comes to $110.05. if alberto receives a 15% tip, about how much will he receive?

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?