Three adults and four children must pay $106. Two adults and three children pay $75. Find the price of the adult's ticket and the price of a child's ticket.

An angle that measures between 90 and 180° is called a(,

2.5 milligrams is equivalent to how many grams

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?