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1. The product AB =
A. B. [-37 21]C. D. E. product is not defined
2. The first row, second column of the product is
A. -5x - 3B. -x - 3C. 1 - x2D. 4xE. 2x + 2
3. If , and AX = B , then the size of X is
A. 3 rows, 3 columnsB. 3 rows, 2 columnsC. 2 rows, 2 columnsD. 2 rows, 3 columnsE. cannot be determined
4. The chart below shows the number of small and large packages of a certain brand of cereal that were bought over a three-day period. The price of a small box of this brand is $2.99, and the price of a large box is $3.99. Which of the following matrix expressions represents the income, in dollars, received from the sale of cereal each of the three days?
A. B. C. D. E.
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