Simplify this math problem show Your work

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.

Which graph shows the solution to the system of linear inequalities? y-4t< 4 y

Add. express your answer in simplest form. 12 9/10+2 2/3 = i need u guys to me find the answer to this question