Mary brought $20 for the skating rink. she paid $5.50 admission and $3.75 to rent skates. she also purchased two bottles of water for $1.25 each and a snack for $2.75. which expression can be used to determine how much money mary has left 20 - 5.50 + 3.75 + (2) (1.25)+2.7520-(5.50+3.75+2(1.25)+2. 75)(5.50+3.75+2(1.25)+2.75)-20 how much money does mary have left? $3.50$5.50$6.50