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.
Jfjdhdhfhdhdhfhfhffjfhfhfjfjfjfjfhfh
Answer: 69/15=4 and remainder 9
Step-by-step explanation: Since 15 x 4 = 60, 15 can't go into 9 so 9 in the leftover
Answer:
undefined
Step-by-step explanation:
Sin(x) = 0 where x = 0
Cos(x) = 1 where x = 0
Cot(0) is undefined
Answer:
Bolt A will fit Nut A and Nut B
Step-by-step explanation:
We have the following statements:
Nut C fits on Bolt C.
Nut B fits on Bolt B.
Nut A fits on Bolt A.
Bolt C is larger than Bolt B.
Bolt A and Bolt B are exactly the same.
Then we can say that Bolt A will fit Nut A and Nut B...