Sally is standing on the tope of a river slope and throws a ball. the height of the ball is modelled by h( t) = -5t*2-10t+240 where h (t) is height in metres and t is time in seconds. when will the ball hit the ground?

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

What is the slope of the line that contains the points (-2,1) and (0,-3)

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?