Answer
The derivative is 1.
Work Step by Step
When two or more functions are being added or subtracted, the derivative of the function is the derivative of every "mini" function being added or subtracted; hence the derivative of f(x) is equal to (the derivative of x) + (the derivative of 11). The derivative of x being 1 and the derivative of 11 being 0, we get the overall derivative to be 1.