The areas of two squares P and Q are 900cm and 400cm respectively. Find the ratio of the sides P and Q.​

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 is the value of x in the equation 1.5x+4-3=4.5(x-2)?

The median am of triangle ∆abc is half the length of the side towards which it is drawn, bc . prove that triangle ∆abc is a right triangle, and find angle mac and abm