Please help and try your best i have already solved the ones with a mark

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.

Do,h = (7, 9) (14, 18) the scale factor is

Complete the solution of the equation. find the value of y when x equals -5. -4x - 8y = -52