Jaime is signing her new puppy up for training classes. Her local dog trainer charges an initial registration fee to assess the puppy, and then a certain amount per class. Jaime's cost (y) for a certain number of classes (x) is represented by the equation y = 30x + 15

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.