You are charged 6.5% tax on a $42 purchace. what is the amount of tax

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

Given abcd ac=38 and ae=3x+4 find the value of x

Triangle knm is what is true about the sides of knm