For this case we have the following numbers:
Number 1: 171
Number 2: x
By definition, the average of two numbers is given by:
[tex]Average = \frac{number 1 + number 2}{2} [/tex]
Substituting values we have:
[tex]Average = \frac{171+x}{2} [/tex]
Answer:
the following represents the expression:
(171 + x)/2