Answer: F
Explanation: you already know you have a 90° and the straight lines means it’s 180° so you need to find x and z which are the same so 2x + 90=180 which you would then subtract 90 from 180 which would be 90 then divide 90 by two which would be 45
The standard deviation is lower for each group than it is for the groups combined.
here you go . i hope this helps
Answer:
635 (635.0293 not rounded)
