The expression 1/7a + 1/7

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

Which of the following graphs represents the function f(x) = 2^x

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