In a class 6, there are 2 students who forgot their lunch , if the teacher chooses 2 students , what is the probability that both of them forgot their lunch ?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

Answer asap! show all work! find the number of complex roots, the possible number of real roots and the possible rational roots of the polynomial function. then, solve for all roots. x^3 + 2x^2 + 3x + 6 = 0