Need ACTUAL help would really appreciate it

What is the distance between the points (2 -3) and (-6 4) on the coordinate plane

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?

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39