B-4z over 7 = a solve for b literal equations

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?

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

The surface area of the triangular prism is .