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Use matrix multiplication to answer an application question

Question 1 of 8

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Matrices \(A\) and \(B\) describe low-cost items sold at sports-centre kiosks. The columns of \(A\) and the rows of \(B\) use the same item type order

A: Items sold

Rows, in order: Pool kiosk, Court kiosk, Track kiosk

Columns, in order: Water bottles, Fruit cups

A = \begin{bmatrix} 1 & 2 \\ 2 & 1 \\ 3 & 4 \end{bmatrix}

B: value for one unit of each item type

Rows, in order: Water bottles, Fruit cups

Columns, in order: Sales value

B = \begin{bmatrix} \$1.92 \\ \$1.37 \end{bmatrix}