What is the value of 2b^2 + 9 when b+3?

Write an explicit formula that represents the sequence defined by the following recursive formula:

What’s the domain of this function? fastttt

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?