+5 points

Which expression represents half of the two numbers (n + 1) and (n + 2)?

This should be worded

Which expression represents half of the sum of two numbers (n + 1) and (n + 2)?

try doing an easier one and then just copy the technique

what is the sum of 3 AND 5                3+5

What is half the sum of 3 and 5          (3+5)/2

now copy the technique for your question. :)