Help asapp my mum is gonna kill me

P= $1400,300 r = 7 1/2% t = 4 what is i ? $4.29 $429.00 $4290.00

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.

Solve 3x-18=2y and 5x-6y=6 by elimination show work