Can someone help with #5? (will give brainliest)

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

Ihave a triangle with a 60 degree angle. lets use d for that angle. what are the values of e and f if d is 60 degrees? and what do you notice about the values of e and f?

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test