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Mathematics, 05.12.2019 01:31 tggfjhzf

Cathy pays $25 a month plus $0.05 per text message. she models this with the function c = 0.05x + 25. if the text messaging fee increases to $0.10, what is her new function?
a) c = 10x + 25
b) c = 0.10x + 25
c) c = 0.10x + 0.05
d) c = 0.05x + 0.10

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