What is the answer to 4.48-2.60

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.

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

Find the zeros of each function. f(x) = x^2 + 5x - 6