If five times the square of a certain positive number is decreased by twice the number, the result is 16. Find the
number [Only an algebraic solution will be accepted.]

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

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?

1/2+1/6-3/4 simplify the given expression leaving the answer in improper fraction form.