The greatest 6 digit even numbers with 4 in the ten thousand place and all digits different

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?

Find the greatest common factor of the followig monomials 46g^2h and 34g^6h^6

What are the measures of angles a, b, and c? show your work and explain your answers. 25 points