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Mathematics 12 Online
OpenStudy (anonymous):

The cost, c, of a health club membership is related linearly to its length in months, m. If a 12-month membership costs $260 and an 18-month membership costs $380, which equation can be used to find the cost of a 30-month membership? A. C-380=18-12/380-260(30-18) B.C-18=380-260/18-12(380-30) C. C-380=380-260/18-12(30-12) D. C-18=380-260/18-12(30-12) I got B and it wasn't correct...

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