Finding cost model with joint equation


Assignment:

The cost of labor varies jointly as the number of workers and the number of days that they work. if it costs $1450 to have 16 people work for 7 days, how much will it cost to have 20 people work for 13 days?

a. $3367
b. $3380
c. $3385
d. $3388
e. $3395

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Algebra: Finding cost model with joint equation
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