sebcbal
24.07.2019 •
Mathematics
The function f(x) = 0.11x + 43 relates how much derek pays for phone service, f(x), to the number of minutes, x, used for international calls in a month. what is the value and meaning of f(320)? a: $78.20; this is the amount derek pays for 320 months of service. b: $78.20; this is the amount derek pays for 320 minutes of international calls. c: $92.50; this is the amount derek pays for 320 months of service. d: $92.50; this is the amount derek pays for 320 minutes of international calls.
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Ответ:
Simply substitute in 320 wherever there is an x and solve. The problem also already told us that x stands for minutes so we know it is 320 minutes.
Ответ: