The equation of a circle is x2 − 4x + y2 + 8y − 29 = 0. what are the center and radius of the circle?

Which function is represented by the graph

At a sand and gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 16 cubic feet per minute. the diameter of the base of the cone is approximately three times the altitude. at what rate is the height of the pile changing when the pile is 12 feet high? (hint: the formula for the volume of a cone is v = 1 3 πr2h.)

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10