Sec 3/4 E Math T15-Q14 - Using matrices to calculate sales revenue

Sec 3/4 E Math T15-Q14 - Using matrices to calculate sales revenue

Secondary 3
Original parallel to Sec3&4 E Math FA

Two outlets sell notebooks and calculators. Their sales matrix is \(S=\begin{pmatrix}16&10\\12&18\end{pmatrix}\), where columns represent notebooks and calculators. The price matrix is \(P=\begin{pmatrix}18\\25\end{pmatrix}\).

  1. Evaluate \(SP\).
  2. State what each entry of \(SP\) represents.

Solution:

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Answer:(a) \(\begin{pmatrix}538\\666\end{pmatrix}\); (b) outlet revenues in dollars.

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