Please help it is due today

3(10x-y)-5(x-y^2) need this solved asap

What is the area of mnp? 40 m2 60 m2 68 m2 127.5 m2

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?