Y=x^2-2x-15. What is the vertex of the parabola?

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Find the slope of the line passing through a pair of points