How is u doin in school?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+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.

What are the coordinates of the point that is 1/3 of the way from a to b? a (2,-3) b (2,6)