What is the answer to dis

Solve for x.
-8-
X

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Witch represents the inverse of the function f(x)=1/4x-12

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.