What is 4x-8+5x=28 plz help me with this

Write a story that matches with the expression 42x-5 pls hurry

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

Is the power produced directly proportional to the wind speed, give reasons for your answer?