The equation of a parabola is given. y=−16x2+7x−80 what is the equation of the directrix of the parabola?

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 x & pleeeeaaaassseeee me !

1foot = 12 inches; 1 yard = 3 feet