Answer:
2.0
Step-by-step explanation:
Couldn't really understnd what you wrote but I'll assume it's the standard deviation of a fair, 7-sided die
The standard deviation is just the square root of the variance (which is just the second moment minus the first moment squared)
The first moment (AKA the average is..)

The second moment is..


Answer:
164
Step-by-step explanation:
Remember, everytriangle is 180 all together. So add what you see and subtract it from 180.
9+7= 16
180-16= 164
Hope it helps
√29/2 since cotangent deals the reciprocal of tangent and cotangent value is adjacent side/opposite side