Fifteen pencils are sold for $750. what is the cost for 1 pencil ?​

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

What expression is equivalent to 42x-56y

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?