Write the inequality that represents the possible values for x

Which of the following would represent the sum of 3 consecutive integers if x is the first integer?

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

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?