Students from Oak Middle School and Lake Middle School are holding a car wash to raise money for charity. The expression 72 + 60 represents the amount Oak Middle School raises. The expression Sy +- 30 represents the amount Lake Middle School raises. Which expression shows the total amount the two schools raise?​

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.