Posted by Peter on Tuesday, October 4, 2011 at 1:52am.
The Carbon coal company has 2 mines, a surface mine ad a deep mine. it costs $200 per day to operate the surface mine and $250 to operate the deep mine. Each mine produces a medium grade and a mediumhard grade coal, but in different proportions. This surface mine produces 12 tons of medium grade and 6 tons of mediumhard grade coal per day, and the deep mine produces 4 tons of medium grade and 8 tons of mediumhard grade coal every day. The company has a contract to deliver at least 600 tons of medium grade and 480 tons of mediumhard grade coal within 60 days. How many days should each mine be operated so that the contract can be filled at minimum cost?

Algebra 2 (Linear Programming)  Swaggg, Tuesday, October 4, 2011 at 9:41pm
42x^269x+20=7x^28

Algebra 2 (Linear Programming)  Fzs, Monday, February 13, 2017 at 7:20pm
Xbxz
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