Can y’all help me me on question 2?! Have a good day!

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

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Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.