Calculate the expected value, the variance, and the standard deviation of the given random variable x. (round all answers to two decimal places.) twenty-six darts are thrown at a dartboard. the probability of hitting a bull's-eye is .1. let x be the number of bull's-eyes hit.

Evaluate cos2θ for cosθ = square root of 3/2

Select the conic section that represents the equation. 3x2 + 3y2 -2x + 4 = 0

Aschool allots ? 1500 to spend on a trip to the theatre. theatre tickets have a regular cost of ? 55 each and are on offer for 1 5 off. a train ticket for the day will cost ? 12 each. if 2 teachers and the maximum number of students attend, how much money will the school have left over?