It’s c sorry if i’m wrong!
Answer:
The number is 2
Step-by-step explanation:
Twice a number (z) = 2*z = 2z
Twice a number (z) added to 21 = 2z + 21
9 times the number added to 7 = 9z + 7
9z + 7 = 2z + 21
Subtract 2z form both sides
9z - 2z + 7 = 21
7z + 7 = 21
Subtract 7 from both sides
7z = 21 - 7
7z = 14
Divide both sides by 7
z = 14/7
z = 2
Answer:
option c = angle b
Step-by-step explanation:
as angle b is inside the polygon as the rest angles are exterior(outside the polygon )
Polynomial :



The rest are not polynomials.
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I hope that helps you out!!
Any more questions, please feel free to ask me and I will gladly help you out !
~Zoey
Answer: 800
Step-by-step explanation: