Amy drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 10 hours. When Amy drove home, there was no traffic and the trip only took 17 hours. If her average rate was 18 miles per hour faster on the trip home, how far away does Amy live from the mountains?

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.