Half as much as the difference between 2 1/4 and 3/.8

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

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?

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9