(a-√a/√a-1) - (√a+1/a+√a) : √a+1/a. solve a

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.

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

The paint recipe also calls for 1/4 cup of food coloring. tyler says mrs.mcglashan will also need 6 cups of food coloring. do u agree or disagree? explain.