If all of the diagonals are drawn from a vertex of a hexagon, how many triangles are formed?

What is the area of the trapezoid shown ?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Peter applied to an accounting firm and a consulting firm. he knows that 30% of similarly qualified applicants receive job offers from the accounting firm, while only 20% of similarly qualified applicants receive job offers from the consulting firm. assume that receiving an offer from one firm is independent of receiving an offer from the other. what is the probability that both firms offer peter a job?