The mean life of a tire is 30,000km. The standard deviation is 2000km.

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

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.