What is the square root of 6474657 * 5

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?

3x + 4y = 5 x- 3y = -7 solve by substitution

What is the measure of angle 1? a.28 b.152 c.168 d.64