Unless otherwise specified assume that all matrices in theseexercises are n  n Determine which of the matrices in Exercises1–10 are invertible Use as few calculations as possible Justifyyour answers1

To determine if this matrix is invertible, we need to find its determinant.

det = (5)(-6) - (7)(-3) = -30 + 21 = -9

Since the determinant is not zero, the matrix is invertible.