Matrices A Test Review

State the dimensions of the matrix.

Given matrix A, find the indicated element.

a₁₃

If A is a 5x2 matrix and B is a 2x4 matrix, what are the dimensions of AB?

Solve the equation for x.

Given the matrices, find AC.

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• Does Not Exist

Given the matrices, find C^-1.

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• Does Not Exist

Given the matrices, find det(D).

• 49

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• -49

• Does Not Exist

Given the matrices, find 2A + C.

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• Does Not Exist

Write the matrix equation to represent the system of equations.

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Use matrices to solve the system of equations.

• x = -3, y = 7

• x = 143, y = 83

• x = 6, y = -7

• No Solution