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Mathematics 10 Online
OpenStudy (.whitedragon.):

The cost of a long-distance telephone call is given by the function C(m) = 0.15m + 0.75 where m is the length of the call in minutes. Determine how long a phone call can be made for $9.75. 120 minutes 60 minutes 65 minutes 70 minutes

OpenStudy (dan815):

9.75= 0.15m + 0.75, solve for m

OpenStudy (.whitedragon.):

so 65?

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