Gina wilson all thing algebra unit 4 homework 1 please help

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?

Rewrite so the subject can be y in the formula d=m-y/y+n

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.