How can i evaluate the expression of , m=4 and n=9 , n+5m

Can someone me do math because i am having a breakdown rn because i don’t get it

Find all solutions for 2y - 4x =2 y = 2x + 1 site: socratic. org

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?