Jill sold half of her comic books and then bought sixteen more. she now has 36. with how many did she begun?

Find the roots of the equation below. x^2 - 6 + 9 = 0

Use the distributive law to multiply. 3(4x + 5y + 6)

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.