Find the expressions that are equal..use the equal expressions to write true number sentences ? ?

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.

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area