mark is an auto dealer he sold a car and made a loss of 10% if his loss was $150000 A calculate how much he sold the car for B what was his cost price

Ineed if you could explain and give me the answer you! this needs done

Just tell me how to set up the equation.

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.