What's the value of C and D in the formula? Volume problem

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

Graph the equation. select integers for x

What is the equation of the line that is parallel to the line with the equation y= -3/4x +1 and passes through the point (12,-12)