-6+3=-3
-6-3=-9
so -3 and -9
135 divided by 9 is 15 so there's 15 people in each group and this people 15 people will watch each movie.
Yes, because it still have 3 sides.
Answer:
8
Step-by-step explanation:
-12u and 12u cancel each other out. Leaving 8 by itself.

-----------------------------------------------------