If a=(-2,-4) and b=(-8,4) what is the length of ab

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?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Do,h = (7, 9) (14, 18) the scale factor is