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.
Each display case holds 15 cars, so 4 display cases will hold 4 * 15 = <<4*15=60>>60 cars.
Elliot has 28 cars now, and each month he can buy 3 more, so he needs 60 - 28 = <<60-28=32>>32 more cars.
At a rate of 3 cars per month, it will take him 32 / 3 = <<32/3=10.67>>10.67 months to get enough cars to fill all 4 display cases.
Since we can't have a fraction of a month, it will take Elliot 11 months to have enough cars to fill all 4 display cases. Answer: \boxed{11}.