Succsessive discount of 20% and 10% are taken on an item priced at $16. describe how to find the sale price of the item and give the sale price

Average acceleration: i have no idea how to do this.

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.

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?