Can someone please help me with math.

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?

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x