8−9(x+1)=ax+4
in the equation shown above, aaa is a constant. which of the following values of aaa results in an equation with exactly one solution?

Can someone me and plz do the problem

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?

3x = 729 solve for x plz . it's urgent. will mark