Answer:
He can take 11 friends.
Explanation:
110 - 20 = 90
Then you do simple math, how many times can 8 go into 90? Well, 8 times 10 is 80, so add 8 more and you have 88 (Which is 8 times 11).
90 - 88 = 2, so you can put in anymore.
BEST OF LUCK IN MATH!