Yes, the inverse of a symmetric matrix is also symmetric.
Take the symmetric matrix A, we have:

and

This gives:

Using the properties:

and

We get:

Since

, we can perform the substitution to get:

Multiplying by

on both sides:



Proving that the inverse of a symmetric matrix is also symmetric.
Answer:
1/8 of the budget was left for other expenses.
Step-by-step explanation:
1/4 of the budget - buildings and maintenance.
Administrative personnel : 1/4 + 1/8 = 2/8 + 1/8 = 3/8 of the budget.
Therefore:
3/8 of the budget - administrative personnel.
Public safety : 3/8 - 1/8 = 2/8 = 1/4 of the budget.
For other expenses :
1 - ( 1/4 + 3/8 + 1/4 ) = 1 - ( 2/8 + 3/8 + 2/8 ) 1 - 7/8 = 1/8
Finally, 1/8 of the total budget was for the other expenses.
98.75
Just do 0.25 (25%) times 395
its the same as doing 395 divided by 25
Y=-3 would be the correct answer:)