Matrix+equations+and+inverses+(how+do+we+tell+when+two+matrices+are+inverses?)+Set+3

Give an example of a system of 4 equations with 4 unknowns whose solution is (2, 1, 0, 3). Ask a classmate to solve the system of equations by setting up a matrix equation and show how to solve using inverses.

Give two pairs of matrices -- one pair that are inverses and one pair that is not. Ask a classmate to determine which pair of matrices are inverses, and demonstrate why. This classmate is NOT allowed to use a calculator!!