SOLUTION: A company produces alarm clocks. During the regular workweek, the labor cost to produce one clock is $2.00. However, if a clock produced on overtime, the labor cost to produce it i

Algebra ->  Inequalities -> SOLUTION: A company produces alarm clocks. During the regular workweek, the labor cost to produce one clock is $2.00. However, if a clock produced on overtime, the labor cost to produce it i      Log On


   



Question 987504: A company produces alarm clocks. During the regular workweek, the labor cost to produce one clock is $2.00. However, if a clock produced on overtime, the labor cost to produce it is $3.00. Management has decided to spend no more than $21,000 on labor costs per week. The company must produce 10,000 clocks this week. What is the minimum number of clocks that must be produced during the workweek?
I hope you guys can help me solve a word problem! I've tried to figure out the different equations for the workweek vs. overtime and the 10,000 is the number I think that's throwing me off the most! Hope you can help! Thank you!

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +a+ = number of clocks produced
during the regular workweek
Let +b+ = number of clocks priduced
during overtime
-------------------
given:
(1) +a+%2B+b+%3E=+10000+
(2) +2a+%2B+3b+%3C=+21000+
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Multiply both sids of (1) by +-3+
(1) +-3a+-3b+%3C=+-30000+
Add (1) and (2)
+-a+%3C=+-9000+
+a+%3E=+9000+
--------------------
The minimum number of clocks that must
be produced during the workweek is 9000
--------------
check:
(1) +b+%3E=+1000+
and
(2) +2%2A9000+%2B+3%2A1000+%3C=+21000+
(2) +18000+%2B+3000+%3C=+21000+
-----------------------------------
Try plotting +b+=+f%28a%29+ for (1)
and (2), and find the area between the
lines that are permitted values of
+a+ and +b+