Answer:−
1
2
+
6
4
Step-by-step explanation:−
3
4
(
4
−
2
)
Simplify
1
Combine multiplied terms into a single fraction
−
3
4
(
4
−
2
)
−
3
(
4
−
2
)
4
2
Distribute
Solution
−
1
2
+
6
Answer:

The reason is because we assume that each week have the same weight and replacing we got:

And the best option would be:
D. 221.25
Step-by-step explanation:
For this case we have the following data given
Week 1 2 3 4
Minutes 190 163 327 205
For this case we can find the mean with the following formula:

The reason is because we assume that each week have the same weight and replacing we got:

And the best option would be:
D. 221.25
Answer:
x-5=-3
Step-by-step explanation:
|x-5|+2=5
|x-5|=5-2
|x-5|=3
x-5=±3
so x-5=-3 is a correct step.
The answer is C, mean =100 and standard deviation=15