Answer:
-1.6
Step-by-step explanation:
4x-2/5
=-8/5
=-1.6
3420°
explanation:
the equation of the sum of interior angles are (n-2)x180
polygon above has 21 sides so you sub n as 21 and plug the equation in the calculator
The answer is 10...............
Step-by-step explanation:
6а – 2а = -48
4a=-48
a=-12