Can the following two matrices be added `[(1,2,3),(4,5,6),(7,9,8)],[(6,4),(4,7),(3,3)]`

Identify the singular and non-singular matrices: [(1,2,3),(4,5,6),(7,8,9)]

The order of the matrices [{:(1,2,3),(4,5,-1):}], [{:(2,4),(9,2),(6,3),(4,1):}] , [{:(4,5,6),(3,2,1),(9,8,7):}] respectively are :

Find the matrix A such that A[{:(1,2,3),(4,5,6):}]=[{:(-7,-8,-9),(2,4,6):}] .

If A={1,2,3,4,5,6,7,8} and B={1,3,4,6,7,8,9} then