Find an explicit expression that gives the average grade on an exam if the related video is m minutes

How do you multiply a mixed fraction by a regular fraction

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?

Grant simplified the expression 1.5(-3.2 + 2.5) his work is shown below explain the error in grants work