Holt mcdougal algebra 2 ch. 1 test form b

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.

2x + 1 < 5 solve the following inequality. then place the correct number in the box provided.

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')