Rewrite the term 
Expand each term so we have
Use the fact that 
Use the fact that 
when a is an even number
Simplify
Let me know if you need any clarifications, thanks!
Step-by-step explanation:
in step 2 leon made mistake
8.9-3.3j=-2.2j+2.3
add 3.3j to both sides
8.9=1.1j+2.3
subtract 2.3 from both sides
6.6=1.1j
divide both sides by 1.1
6=j
Answer as a fraction = 2/3
Answer in decimal form = 0.667 (approximate)
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Explanation:
The first thing we need is to find the mean. Add up the values to get 3+3+4+5+5+4 = 24. Then divide by n = 6 since there are 6 values.
24/n = 24/6 = 4
The mean is 4
Now subtract the mean from each value
- 3-4 = -1
- 3-4 = -1
- 4-4 = 0
- 5-4 = 1
- 5-4 = 1
- 4-4 = 0
Apply absolute value to each result so that the difference is not negative.
We get this new list: {1, 1, 0, 1, 1, 0}
Now compute the mean of that new list to get the final answer
1+1+0+1+1+0 = 4
4/n = 4/6 = 2/3 = 0.667 approximately
