Answer:
5n+6n
Step-by-step explanation:
Basically you are adding the coefficients of the numbers.
1. Add 4n + 7n, this will get you 11n
2. Add each of the answer choices, the first one will equal 10n, the next one will equal 12n, the third one will equal 11n, and the last one will equal 10n
3. Choose the one that has the same sum, in this case, 5n+6n is correct as it also equals 11n
