If f(x)= |x| +9 and g(x)= -6,whitch describes the value of (f+g)(x)

With this one. will mark brainliest

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.

If a || b and e || f , what if the value of y ?