Which function has real zeros at x = 3 and x = 7?

Answer question above and explain each step : )

Find the difference (8ab+a+2) - (3ab+6)

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?