7) John bought I pineapple, 1 bag of cherries and 3 watermelons at a fruit stand. The
pineapple cost $2.80, the bag of cherries cost $3.90 and the watermelons were each $1.80.
If he paid with a twenty dollar bill, how much change should he get back?

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.