Step 2 Place the card information in a matrix with appropriate dimensions for multiplication by the coding matrix.
What size array should you use for the card information?
Since the coding matrix has two columns, the information matrix must have two rows, so they can be multiplied.
Step 3 Multiply the coding matrix and the information matrix to encode the information. Use a calculator.
Step 4 The coded account number is
Multiply the coded information by the inverse of the coding matrix.
Evaluate the determinant of each matrix.
Find the inverse of each matrix, if it exists.
Error Analysis What mistake did the student make when finding the determinant of