In the figure above, what is the value of w?

Anyone know? is appreciated! will mark brainliest if correct!

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

Does the point (1, sqrt 7) lie on circle shown.