Wow, using grammar makes me feel like an adult!

In the diagram of circle a what is m

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 letters from the table represent like terms? a and b b and c a and d b and d