Which statement is true about the product of a non-zero rational number and an irrational number?
a)the product of a non-zero rational number and an irrational number is always a rational number.
b)the product of a non-zero rational number and an irrational number is never an irrational number.
c)the product of a non-zero rational number and an irrational number is sometimes a rational number.
d)the product of a non-zero rational number and an irrational number is always an irrational number.

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.