In Exercises 29–36, determine whether the subset of Mn, n is a subspace of Mn, n with the standard operations. Justify your answer The set of all n × n matrices A that commute with a given matrix B; that is, AB = BA

Rosy waxes 2/3 of her car with 1/4 bottle of car wax.at this rate,what fraction of the bottle of car wax will rosey use to wax her entire car

Evaluate the expression. (9 + 5)(3 + 2)0

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?