Wastewater Treatment Equipment Purchase Optimization: Inequality Modeling
Assuming 'x' units of model A wastewater treatment equipment are purchased, then '(8-x)' units of model B equipment are purchased. According to the given conditions, we have:
\begin{cases}
12x+10(8-x) \leq 89
200x+160(8-x) \geq 1380
\end{cases}
Therefore, the correct set of inequalities is:
\begin{cases}
12x+10(8-x) \leq 89
200x+160(8-x) \geq 1380
\end{cases}
Hence, the answer is A.
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