What is the name for the point where three altitude lines meet? 1) incenter 2) circumcenter 3) concurrence 4) centroid 5) orthocenter

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.

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

The median am of triangle ∆abc is half the length of the side towards which it is drawn, bc . prove that triangle ∆abc is a right triangle, and find angle mac and abm