Kristin is building a pattern using triangles. The table shows the number of triangles in the first 4 terms of the pattern. Term Number (n) 1 2 3 4
Number of Triangles (t) 13 5 7
Which formula describes the number of triangles in the nth term of the pattern?

Which statements about these triangles is true

Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers.a) one of the 400 passengers is selected uniformly at random.let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem

What is the solution set of the quadratic inequality x2- 5< 0? o {xl-55x55{x- 155x55){xl -55x5 15){x1 - 15 sx5/5)