A truck carries 360 crates of avocados to a grocery distribution center. If there are 8640 avocados total, how many avocados are in each crate?

Hi, can anyone show me how to do this problem? 100 points for this. in advance

Due to bad planning, two of the local schools have their annual plays on the same weekend. while 457 people attend one, and 372 attend the other, only 104 people were able to attend both. how many people went to at least one play?

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b