11 1/2f = 103 1/2 find the value of f

Anew fountain in the shape of a hexagon will have 6 sides of equal length. on a scale drawing, the coordinates of the vertices of the fountain are: (7.5,5), (11.5,2), (7.5,−1), (2.5,−1), (−1.5,2), and (2.5,5). how long is each side of the fountain?

For which pair of functions is (gof)(a)=|a|-2?

If a || b and e || f , what if the value of y ?