Como distinguen la información de la opinion sobre un hecho noticiosa?

For a field trip to the zoo, 4 students rode in cars and the rest filled nine busess. how many students were in each bus if 472 students were on the trip

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.