You don't have the complete question here. "...between a number" and what?
First figure out what operation is being used, and then put that operation in the place of the "and" in the statement.
Since difference is subtraction, you will put a minus sign in place of the "and" that should be after the word, "number." So, your answer will be as follows:
4/(x - ___) Fill in the blank with what ever is says after the word, "number,"
Example : 8/a
It is: d/7
__n_ 2
n/6
6/n?
The term "verbal expression" in mathematical terms refers to a math phrase or statement that uses words or letters instead of using numbers. An example of this might be "Three divided by two" instead of "3/2."
As a algebraic expression it is simply n/8
23.5
A rational algebraic expression is the ratio of two algebraic expressions. That is, one algebraic expression divided by another. It is important that the domain is defined in such a way the the rational expression does not involve division by 0.
Example : 8/a
x/5
It is: r/15
50/
It is: d/7
__n_ 2
n/6
It is: t/82