Select the correct statements from the table.

for each expression, select the true statement in the table.

4x^3 -7x+2
this is a rational expression because the denominator contains a variable.
this is a polynomial with 3 terms.

3x^5+4x-6
this is a rational expression because the denominator contains a variable.
this is a polynomial with 4 terms.

(7x^2+3)(5x+1)
this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms.

9x^2-6x+1 divided by 5x+7
this is a rational expression because the denominator contains a variable.
this is a polynomial with 3 terms.

8x^4-x^3+6x^2-3x+9
this is a rational expression because the denominator contains a variable.
this is a polynomial with 5 terms.