1. At a fairground stall, people are given three darts to throw at a target. The number of darts that hit the target, D, follows a binomial distribution with p=0.85.
Find:
a. E(D) and Var(D)
b. The exact probability that two of a person's three darts hit the target.
Help please!!

Graph the system: f(x)= 3/x-2; f(x)= 1/2x + 2

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

The suare root of 9x plus 7 plus the square rot of 2x equall to 7