(Ticket sales) Tickets for a drumline competition cost five dollars at the gate and three dollars in advance 800 tickets were sold at the gate the total revenue from ticket sales was $5500 how many advance tickets were sold?

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.