Farmer Jones must determine how many acres of corn and wheat to plant this year.
An acre of wheat yields 25 bushels of wheat and requires 10 hours of labor per week. An acre of corn yields 10 bushels of corn and requires 4 hours of labor per week. All wheat can be sold at $4 a bushel, and all corn can be sold at $3 a bushel. Seven acres of land and 40 hours per week of labor are available. Government regulations require at least 30 bushels of corn be produced during the current year. Let x1 = number of acres of corn planted and x2 = number of acres of wheat planted