Find the nonpermissible replacement for a in this expression 7/6a

The correct answer for the exercise shown above is:

 zero (0)

 The explanation is shown below:

 1. You have the following expression given in the problem above:

 7/6a

 2. By definition, the nonpermissible replacement for a is the value that make the denominator equal to zero.

 3. Keeping this on mind, you have:

 7/6a=7/6(0)=7/0

 Therefore, as you can see, the answer is: zero (a=0).

Something that is true about that is that it has numbers