What is the least common multiple of 3 and 5 show your work

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

Angela rode his bike around a bike trail that was 1/4 of a mile long he rode his bike around the trail 8 * angelo says he wrote a total of 8/4 miles to russell says he's wrong and he actually and says that he actually wrote to my who is corrupt use words and trying to explain how you know.

Just tell me how to set up the equation.