If the cost price of 18 cycles is equal to selling price of 16 cycles, find the gain or loss percent.

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

Why did the ice arena get so hot after the big game (this is math related google it to find the paper

Find the area of the regular hexagon if a side is 20 cm.