Rewrite the following phrase as a mathematical expression: twice a number increased by eighteen. 2n + 18 18n + 2 2 + 18 2(18n)

Tamera puts 15/4 gallons of gasoline in her car. which mixed number represents the gallons of gasoline? a) 2 3/4 gallons b) 3 1/4 gallons c) 3 3/4 gallons d) 4 1/2 gallons answer it's worth a lot of points!