Question

Can somebody help me with these questions please?
1. Non-square matrices have inverses.
Answer:
Explanation:

2. Multiplication of a matrix and its inverse is commutative.
Answer:
Explanation:

3. In a system of linear equations, if the determinant of the coefficient matrix is zero, the system has no solution.
Answer:
Explanation:

4. If you multiply two matrices and obtain the identity matrix, you can assume the matrices are inverses of each other.
Answer:
Explanation:

Answer 1

wait let me see

Answer 2

non square matrices cannot have inverse

Answer 3

because the identity matrix is a square matrix

Answer 4

i know that left inverse means there exists a right inverse
but i dont htink they necessairly have to be the same

Answer 5

3)it means there is a solution
its invertible so it can be solved

Answer 6

4) yea be cause
AB=I
then
A=B^-1 or
B=A^-1 as
B=A^-1*I = A^1
and
A*B*B^-1 = I*B^-1
so A=B^-1

Answer 7

omg . thanks so much ! :)