Answer:
Breakfast: food - <em>nothing </em>Drink - <em>water</em>
Lunch: food - <em>pizza </em>Drink - <em>soda</em>
Dinner: food - <em>chicken and rice </em>Drink - <em>water & grape juice</em>
The matrix is a 2 by 2 matrix, and the determinant of the matrix by hand is -3
<h3>How to determine the determinant?</h3>
The matrix is given as:
1 2
2 1
The determinant of the matrix is calculated using the following product expression
det |A| = 1 * 1 - 2 * 2
Evaluate the product
det |A| = 1 - 4
Evaluate the difference
det |A| = -3
Hence, the determinant of the matrix by hand is -3
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brainly.com/question/4505228