3x° = (5x-20)° [Interior Alternate Angle]
=> 3x° = 5x° - 20°
=> 5x° - 3x° = 20°
=> 2x° = 20°
=> x° = 
<h3>=> x° = 10°</h3>

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-4 + 7(1 - 3m) =
-4 + 7 - 21m =
3 - 21m
Answer:
12.99km
Step-by-step explanation:
Using the formula
C=2(pi)(r)