K1.6=13
i need help finding the value

Tell whatever the ordered pair is a solution of the given system.

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 graph has a rate of change of zero