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stackpoolekrysp71si4
06.10.2019 •
Mathematics
Customers of a phone company can choose between two service plans for long distance calls. the first plan has an $18 monthly fee and charges an additional $0.14 for each minute of calls. the second plan has an $8 monthly fee and charges an additional $0.19 for each minute of calls. for how many minutes of calls will the costs of the two plans be equal?
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Ответ:
18 - 8 = 0.19m - 0.14m
10 = 0.05m
10 / 0.05 = m
200 = m <== they will cost the same at 200 minutes
Ответ: