A.
To solve, you need to get the variable by itself.
Order of operations:
Square root both sides.
(x-5)= plus/minus root 3, as 3 is not a perfect square.
Now you need to add 5 to both sides to get it to disappear on the side with the x.
x=root3 +or - 5, which can be rearranged so that 5 is the first term.
Answer: 
Step-by-step explanation:
Given
Sample of 12 measurements has a mean of 16.5 and
a sample of 15 measurements has a mean of 18.6
Take 
be the mean and no of measurements
and 
be the mean and no of measurements in second case
Similarly,
Mean of 27 measurements
Answer:
divide the top and bottom by the greatest number that will divide both numbers exactly (they must stay whole numbers).
Step-by-step explanation:
Answer:
3(2m-9n)
Step-by-step explanation:
Find the greatest common denominator take it out and add what you have left. When you work this out you get 6m-27n
