Agardening club has 21 members, of which 13 are males and the rest are females. what is the ratio of females to all club members

Match each inequality to the number line that represents its solution

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.

Could somebody me with this radical simplification?