WHICH ONE DOESN'T BELONG? Which expression does not belong with the other three? $\sqrt{16x}+y$

$\frac{3}{5}m+4n$

$a+\frac{4}{7}b$

$\sqrt{25}+13$
Question 2
Explain your reasoning.

The other expressions are algebraic expressions.

The other expressions are algebraic equations.

The other expressions are algebraic statements.

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?