Question

How do you write a numerical or variable expression for each quantity: two dozen eggs?

Answer 1

One dozen = 12
So
Two dozen = 24

Explanation:

The numerical expression for `2` dozen eggs would be `24` eggs.
Because you already know that there are `2` dozen eggs then you don't need a variable expression, as that is only needed if you don't know how many eggs you have. A variable expression would be used if the question was d dozen eggs.

d dozen eggs would equal to `12d` as a variable expression because `d` is the unknown.

I think this page might help if you are still confused.
Numerical and variable expressions