Can someone pls help me with the middle one?:( plss

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

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2

To determine the number of deer in a forest a forest ranger tags 280 and releases them back