Write the inequalities that describe the constraints on production.The Pen-Ink Company manufactures two ballpoint pens: silver and gold. The silver requires 7 minutes in a grinder and 12 minutes in a bonder. The gold requires 7 minutes in a grinder and 9 minutes in a bonder. The grinder can be run no more than 610 minutes per day and the bonder no more than 230 minutes per day. Let x represent the silver pens and let y represent the gold pens.
A. x + y ? 610, x + y ? 230, x + y ? 840, 
, 
B. 0 ? 19x + 16y ? 840, 
, 
C. 7x + 12y ? 610, 7x + 9y ? 230, 
, 
D. 7x + 7y ? 610, 12x + 9y ? 230, 
, 
Answer: D
Mathematics
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