How do you figure out what is in between 4 and 5 in decimal form

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 another way to express 36 +32

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?