The sum of the squares of two positive numbers is 109. The difference of their squares is 91. Find the two numbers.

Find dy/dx using implicit differentiation ln(20+e^xy)=y

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

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.