Let x represent the number of kilograms of the 1/2:1/2 mix, and y the number of kilograms of the 3/4:1/4 mix. (Here the ratio is nuts to raisins.)
The amount of profit can be represented by P=7x+9.5y.
There are some constraints -- namely the amount of raw materials available. The constraints can be represented by a system of inequalities:
`x>=0,y>=0` are the natural constraints.
`1/2 x+3/4y<=120` represents the amount of nuts available. Each kg of mix x uses 1/2 kg of nuts, while each kg mix y uses 3/4 kg.
`1/2x+1/4y<=90` represents the amount of raisins available.
Graphing the system of inequalities yields a feasible region (in this case a bounded polygon) where every point in the region satisfies all of the inequalities. By the corner point principle, there is a maximum and a minimum for the objective function (the profit function in this case) and they occur at the...
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