What is the median of 77 80 72 82 82 76 82 83 78 81 80 79 85 73 74 79?

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.

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?

What are the greatest common factor of 75 and 30