Elliot collects miniature toy cars. He wants to fill 4 display cases. Each display case holds 15 cars. He has 28 cars now, and he is able to buy 3 more every month with the money he saves from his allowance. How many more months will it be until Elliot has enough cars to fill all 4 display cases? (1 point) Enter your answer in the box. Elliot will have enough cars to fill 4 display cases in _______ months.
Elliot currently has 28 cars. Each display case holds 15 cars, so Elliot needs 15 x 4 = <<15*4=60>>60 cars in total to fill all 4 display cases.
Elliot needs 60 - 28 = <<60-28=32>>32 more cars.
Elliot buys 3 cars per month, so it will take him 32 / 3 = <<32/3=10.67>>10.67 months to buy enough cars to fill all 4 display cases.
Since he cannot have a fraction of a month, Elliot will have enough cars to fill 4 display cases in 11 months. Answer: \boxed{11}.