What is a fraction form of 1.80

Which of these tools or constructions is used to inscribe a hexagon inside a circle?

If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1