Find the sum or difference 1/4(q-12)+1/3(q+9)

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4

What is the absolute value of the complex number -4-sqrt2i

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?