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Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation

Don't know how to find x given these segment lengths

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?