Please help.
Is algebra.

Plzzz i beg u so much asaaaap ! what is the slope of this line? enter your answer in the box.

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.

Factor the expression using gcf 9b+45