Write the phrase as an expression then evaluate x=3 and y=15 7 more than the quotient of a number y and 5

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.

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.

Suppose the equation ||x-a|-b|=2008 has 3 distinct real roots and a not =0. find the value of b.