Alice earned interest of $120 from an investment of $1000 for two years. what is the rate of simple interest per year

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?

To decrease an amount by 16% what single multiplier would you use

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g