Answer:
3420°
Step-by-step explanation:
The sum of angle measures of an n-gon is ...
angle total = (n-2)×180°
For n = 21, the angle total is ...
21-gon total = (21 -2)×180° = 3420°
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EXPLANATION
Given the equation:
1/5m = 4-3/10m (Adding +3/10 to both sides)
1/5m +3/10m = 4 (Adding 1/5 + 3/10)
1/2m = 4 (Isolating m)
m = 2*4 (Multiplying)
m=8
ANSWER: m=8
<span>238.95 is the answer :)))</span>
