In the following exercises, translate to a system of inequalities and solve.
389. Roxana makes bracelets and necklaces and sells them at the farmers’ market. She sells the bracelets for $12 each and the necklaces for $18 each. At the market next weekend she will have room to display no more than 40 pieces, and she needs to sell at least $500 worth in order to earn a profit.
(a) Write a system of inequalities to model this situation.
(b) Graph the system.
(c) Should she display 26 bracelets and 14 necklaces?
(d) Should she display 39 bracelets and 1 necklace?
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