Posted by sharon on .
To cook 4 cups of rice, you use 8 cups of water. To cook 10 cups of rice, you use 20 cups of water. Write an expression to show how many cups of water you should use if you want c cups of rice. How many cuos of water shou you use to cook 5 cups of rice?

math 
PsyDAG,
Water cups = 2*rice cups