Can anyone explain how this is done.

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

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?

In the geometric progression –3, 12, −48… what term is 3,072?