What is the greatest common factor of 4k, 18k^4 and 12

Match the term on the left with its image or description on the right. match term definition diameter a) circle a and a line segment connecting points b and c which are on the circle. circumference b) circle a and a line segment connecting points b and c which are on the circle. radius c) a piece of the circumference of a circle secant d) two circles that share the same center. concentric circles e) the distance around a circle arc f) a segment between two points on a circle that passes through its center

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

Rewrite so the subject can be y in the formula d=m-y/y+n