I am posting this so people can get points so just answer it for point idrk haha

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.

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?