What is the multiplicative inverse of 2 1/2? a) 2/3 b) 2/5 c)2

Negative 5 1/12 + negative 4 1/4 + 6 3/4

How can you tell when x and y are not directly proportional?

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?