Raymond buys bottles of water at $2 each and a large pizza at $13. the total cost was $21. how many bottles of water did raymond buy?

Raymond bought 4 bottles of water

To solve their problems, mesopotamians used irrigation, a way of supplying water to an area of land. to irrigate their land, they dug out large storafe basins to hold water supplies these ditches brought water to the feilds. to protect their feilds from flooding, farmers built up the banks of the tigris and euphrates.hope ths !