What is the domain of f(x) = cos(x)? the set of real numbers Negative 2 pi less-than-or-equal-to x less-than-or-equal-to 2 pi the set of real numbers Negative 1 less-than-or-equal-to x less-than-or-equal-to 1 the set of real numbers 0 less-than-or-equal-to x less-than-or-equal-to 2 pi the set of all real numbers

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

Which letters from the table represent like terms? a and b b and c a and d b and d

What number line represents the solution set for the inequality -1/2 greater than or equal to 4