See if you are cool enough to do the whole paper. i will give brainliest if correct

What is the solution of the systems of equations? y=2/3x+3 x=-2

What is not true about kl and mn? what is mn? (show your work)

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.