The sum of all factors of 15 is the 3rd multiple of a number. what is the number?

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.

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?