When you add 4 to 25 you get 21 then subtract 11 and get 10 and then add 15 which is equal to 25 and then subtract 13.
the answer is 12
Answer:
<h3>The option A)

is correct answer.</h3><h3>The correct simplification for the given expression

is

</h3>
Step-by-step explanation:
Given expression is x to the 12th power times z to the 11th power all over x to the 2nd power times z to the 4th power.
The given expression can be written as 
<h3>To choose the correct simplification of the given expression :</h3>
Now we have to simplify the given expression as below

( by using the identity
)

( by using the identity
)


∴ 
<h3>The correct simplification for the given expression

is

</h3><h3>Hence option A)

is correct answer.</h3>
Answer with Step-by-step explanation:
We are given that
A and B are matrix.
A.We know that for two square matrix A and B
Then, 
Therefore, it is true.
B. det A is the product of diagonal entries in A.
It is not true for all matrix.It is true for upper triangular matrix.
Hence, it is false.
C.

When is a factor of the characteristics polynomial of A then -5 is an eigenvalue of A not 5.
Hence, it is false.
D.An elementary row operation on A does not change the determinant.
It is true because when an elementary operation applied then the value of matrix A does not change.
Answer:
A. 19,70,91
Step-by-step explanation:
Interior angle =180
19+70+91=180