What's a story problem for 3.05 dividied by 0.05

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?

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2