Answer quick please -19/5(10/24)(-4/5)

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.

3.4a=57.8 what is the the value of a

Yvaries inversely as x. y =12 when x=5. find y when x=4