Find the missing segment in the image below

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

Is the square root of 4 plus the square root of 16 rational?

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?