10x15= 150
150/2= 75
Diagonal = 75
Answer:

And if we use the permutation formula given by:

And replacing we got:

Step-by-step explanation:
For this problem we want to find the following expressionÑ

And if we use the permutation formula given by:

And replacing we got:

Hi there!
Before we begin, let's rewrite your equation. :)

Step 1) Add 14 to both sides.

Step 2) Divide both sides by 5.


Final Answer -

Hope this helps!
Message me if you need anymore help! :D
0 because the number in the middle is the midpoint.
I'm pretty sure the answer is C