What is the constant proportionality for 3 and 9

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.

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.