Which of the following is a proportion?

Solve the x in the equation x^2+14x+17=-96

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).