Jon has to pay $7.50 admission
for the skating rink and $1.50
per hour to rent roller blades.
Write an equation for the cost
(y) based on the number of
hours (x).

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.