How would i simplify 1/2 (8x+2)

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?

What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?

What is the sum of these mixed numbers 4 2/3+ 3 1/9