When Mac hops 15 times down the hallway, he travels 18 feet. How many times would he need to hop to travel to class 66 feet away? Please show step by step :)

What expression is equivalent to 1/2(2+3x-6)

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?

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.