Help pls i don't know how to do it

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.

What is the logarithmic function modeled by the following table? x f(x) 9 2 27 3 81 4

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles