3 fifths equals how many 20

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

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2