Help with math

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian 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? i need this done

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?