There is a Minecraft sale for 30% off all games. Which expression represents the total cost of Minecraft Dungeons if it cost x dollars

Abaseball team drinks 10/4 gallons of water during a game. which mixed number represents the gallons of water consumed? a) 1 1/2 gallons b) 2 1/2 gallons c) 2 3/4 gallons d) 3 1/2 gallons