How many students spent at least six hours of homework per week

Prove that quadrilateral is a rhombus.

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.

Matt had 5 library books. he checked out 1 additional book every week without retuening any books. whats the matching equation