NEED HELP ASAP PLEASE JUST FOR THE FIRST QUESTION ON PAGE

What is the answer to |-2x-5|-|-4+8| and x=7

The diagonals of a quadrilaretral intersect at (-1,4). one of the sides of the quadrilateral is bounded by (2,7) and (-3,5) determine the coordinates of the other side in order for the quadrilaretral to be a square.

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16