I need help with these two!

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?

Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?

Tan198=asin164=? how to solve this? ?