The function f(x) represents the time it takes a boat to travel upstream. The function g(x) represents the time it takes a boat to travel downstream. Given f(x) = 3x − 10 and g(x) = 12x + 8, solve for (f + g)(x) to determine the total roundtrip time.

(f + g)(x) = 15x − 2
(f + g)(x) = 9x − 2
(f + g)(x) = 15x + 2
(f + g)(x) = 9x + 2

step-by-step explanation:

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step-by-step explanation: