U why are bicthes bonkerrs and whack

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

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.