How to slove -10 -1 need help

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.

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?