K For the functions f(x) = 3-x and g(x) = x+2x-63, find f+g, f-g, fg, and Determine the domain for each g function. (f+g)(x)=2x-60 (Simplify your answer.) What is the domain of f+g? Select the correct choice below and, if necessary, fill in the answer box to complete you choice. OA. The domain of f+g is { (Use a comma to separate answers as needed.) OB. The domain of f + g is (Type your answer in interval notation.) OC. The domain of f+ g is 0. 13 View an example Get more help - Clear all Check answer