SOLUTION: The costs of a trucking company vary jointly as the number of trucks in service and the number of hours they are used. When 3 trucks are used for 6 hours each, the costs are $1332.

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Question 1154810: The costs of a trucking company vary jointly as the number of trucks in service and the number of hours they are used. When 3 trucks are used for 6 hours each, the costs are $1332. Find the costs of using 10 trucks, each for 11 hours.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+1332+=+k%2A3%2A6+
+1332+=+18k+
+k+=+74+
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Let +a+ = the number of trucks
Let +b+ = the number of hours
Let +C+ = the cost
+C+=+k%2Aa%2Ab+
+C+=+74%2A10%2A11+
+C+=+8140+
$8,140 is the cost