The range of communication is about 55 meters.
Answer:
x = 70
Step-by-step explanation:
Ok first let's find the angle where there is an exterior angle:
180-120=60
Then add this and the other inside known angle and subtract that from 180 to get your answer:
60+50=110
180-110=70
October meeting is 3 times more than the number of people at September meeting.
Sept meeting = 21 ÷ 3 = 7
7 people were at the September meeting.