a wedding planner accounts for 8 chairs at every round table. how many tables will be needed to seat 175 people?

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.

Plz me plz i will give a brain just plz

Which function is represented by the graph