In a play-school with 500 students, the number of boys is 20 more than five-sevenths of the number of girls. Let’s find the number of boys and girls in the play-school. If we assume x to be the number of girls in the play-school, the number of boys can be expressed as:

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.