The area of a trapezoid is given by the formula A 1/2= (b 1 + b 2)h, solve the formula for h

The parabola opens: y=√x-4 (principal square root) up down right left

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?

Can someone me out here number 4 plz