Difference and similar between ratio and rate

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation

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.