Answer:
What are the possible answers?
X + 2x + x + 10 = 90
4x = 80
x = 20
Answer:

Step-by-step explanation:
To evaluate
from the following expression:

Taking 


∴ 
Answer:
D to C
Step-by-step explanation:
The radius is half the diameter or the center point to the edge (circumference)
The answer I believe is the third choice.
3, -2, -7, -12
These all fit into f(n)-5=f(n+1)