Select the functions f(x) = 0.2x" and g(x) = 15-x. Select the Operation f+ g and Combine Functions box, and slowly slide the x-slider to the right to graph the function (f + g)(x). Check the Show Domain box. What is the domain of the function? Use the interactive figure to find your answer. Use the left and right arrow keys to move along a slider as needed. Click here to launch the interactive figure. . . . . . The domain of (f + g)(x) is . (Type your answer in interval notation.)