Identify the center and radius of a circle with equation (x - 7) ^2 + (y + 6)^2 = 16

Acable car begins its trip by moving up a hill. as it moves up, it gains elevation at a constant rate of 50 feet/minute until it reaches the peak at 2,000 feet. then, as the car moves down to the hill’s base, its elevation drops at the same rate.

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.