Please help me i got points

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?

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.