Derek is placing a seven-line classified job for
an assistant. the following piecewise function
gives the price of an x-line ad.
aly-232, when3
* 32+966-3), when3
find the difference between the cost of a 6-line
ad and the cost of a 7-line ad.

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.