Help help help help help due tmr

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.

Use mathematical induction to prove the statement is true for all positive integers n, or show why it is false. 1^2 + 4^2 + 7^2 + + (3n - 2)^2 = [n(6n^2-3n-1)/2]