Which equation is a proportion

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

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?

Patty made a name tag in the shape of a parallelogram. reilly made a rectangular name tag with the same base and height. explain how the areas of the name tags compare.