How do you know which one is the smallest one?

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

In the triangles, bc =de and ac fe.if the mzc is greater than the mze, then ab isdfelth

Which of the following is not a subset of {1,2,3}?