Roys car gets an average gas mileage of 29mi/gal. roy starts his trip with 12 gal of gas. how many gallons of gas are left after a 140 mile trip? (only an algebraic solution can receive full credit)

Francis is getting new carpet tiles in his living room and den. his living room and den are connected. he needs to figure out how much carpet he needs and the cost involved. if each tile costs $2.00 per sq ft, how much would it cost to have new tile put in the den? a) $24 b) $36 c) $48 d) $54 plz awnser soon