Given a polyhedron with 20 vertices and 30 edges, how many faces does it have?

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

What is the ratio of the length of an object in yards to the length of the same object in miles?

Need ! the total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?