What is the unit rate for 7 phone calls in 2 hours

Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.

What is the quotient of m^6/5 ÷ 5/m^2? assume m does not equal pl

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?