Matrices and Their Inverses Answers

Which of the following statements are true about inverse matrices?

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✔ areare not

Determine if these matrices are inverses by calculating AB: c11 = c12 = c21 = c22 = So the matrices inverses of one another.

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✔ is commutativeis not commutative

a = b = c = d =

c11 = c12 = c21 = c22 = So the matrices inverses of one another.

Which pairs of matrices are inverses?

Find the elements of D.a = b = c = d = e = f = g = h = i =

Select the matrix that is the inverse of:

Use your knowledge of inverses and matrix multiplication to answer the following:AB = AB✔ I

Internet sites often ask for a secret phrase to recover lost passwords. Jason encoded a secret phrase using matrix multiplication. He multiplied the clear text code for each letter by the matrix: The matrix representing the encoded text is:Jason’s secret phrase is:

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b =

ABA = ✔ ABI