06-03-2019
Mathematics

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Tammy calls her grandmother every Saturday night there are two phone company she can use Telcom charges $.12 per minute in united phone charges a flat fee of $.78 +9 cents for every minute there after how many minutes can Tammy talk to her grandmother an bs charged the same amount by either phone company

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ariettaxylas ariettaxylas

06-03-2019

the answer is about 13.63 repeating

[tex].12x = .78x + 9[/tex]

[tex] - .66x = 9 [/tex]

[tex]x = 13.63 \infty [/tex]

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