Anj12
Anj12
07-02-2018
Mathematics
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How do we do this question?
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choixongdong
choixongdong
07-02-2018
let x = # of monthly fee
f(x) = (50x + 30)/x
average cost will be below 56 for how many months?
(50x + 30)/x = 56
50x + 30 = 56x
56x - 50x = 30
6x = 30
x = 5
answer:
the average cost will be below $56 for 5 months
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