If I have 150 late assignments and there is 3 assignments a day, how many days are there?

Can someone me and do the problem plz so i can understand it more better

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 slope of the line that contains the points (-2,1) and (0,-3)