The school that Jessica attends is selling tickets to the annual talent show. On the first day of selling tickets, the school sold 12 adult tickets and 15 student tickets for a
total of $186. On the second day of selling tickets, the school sold 8 adult tickets and
5 student tickets for a total of $94.
What is the price of each adult ticket? What is the price of each student ticket?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.