Substitute x=2y -2 into the expression 5x +4 and determine the first step

Hello can you me find all the products

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?

The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is