Mathematics, 10.03.2021 22:10 kieante01
Tammy calls her grandmother every Saturday night. There are two phone companies she can use: Telcom charges $0.12 per minute and United Phone charges a flat fee of $0.78 plus $0.09 for every minute thereafter. How many minutes can Tammy talk to her grandmother and be charged the same amount by either phone company? Tammy can talk how many minutes?
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Tammy calls her grandmother every Saturday night. There are two phone companies she can use: Telcom...
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