Y=2x+8 3x+2y=-5 find the solution to this system. answer and explain this, i can't seem to get these questions and im really struggling! !

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?

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

At 6 1/2 cents per pound of string beans how much does 7 pounds cost