At a summer camp, the ratio of campers to adults is kept equivalent to 7:1. (Campers 7, 14, 28, 42 Adults 1, 2, 5, 30)
b. Next week, there will be 63 campers. How many adults should the camp have next week? ​

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.