Answer:
What?
Step-by-step explanation:
Since the only number is 3 multiply all sides by 3
Answer:

Step-by-step explanation:
Given

Required
Determine the mean
The mean of a data is calculated as thus:

In this case:

So, the formula becomes:



Answer:
Hope the picture will help you....
Note: I am not sure about my answer....
Answer:
I believe it is C because it comes out to 8x-10=8x+10
Step-by-step explanation: