A raffle sold 2,000 tickets. What is the theoretical probability of NOT having the winning PLEASE I NEED IT ONLY THE FRACTION PLEASE HELP ME !:(

What is the value of x in the diagram below?

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.

The length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?