A I believe it is the answer
Given:
The figure of a triangle LMN.
P is the centroid of triangle LMN.
To find:
14. Find the value of PN if QN=30.
15. Find the value of PN if QN=9.
Solution:
We know that the centroid in the intersection of medians of a triangle and centroid divides each median in 2:1.
Since P is the centroid it means NQ is the median from vertex N. It means P divides the median NQ in 2:1. So, PN:PQ=2:1.
14. We have QN=30.




Therefore, the value of PN is 20 when QN=30.
15. We have QN=9.




Therefore, the value of PN is 6 when QN=9.
Answer:
(a) 0
(b) -3/26
Step-by-step explanation:
(a)
We essentially plug 1 in for x and 2 in for y.
Our expression is
, so making the correct substitutions yields:

So, the answer for part (a) is 0.
(b)
Again, we're now plugging in 1 for x and 5 for y:

So, the answer for part (b) is -3/26.
Answer:
No
Step-by-step explanation:
When you square a number, you chose a number and multiplying itself. If you did the square root of 25, you would get 5. However if you divided 25 by 2, you would get 12.5 which is NOT the square root.