Combine the like terms to make a simpler expression:
4n+6+n−2

Consider the diagram. which line segment has the same measure as st? rx tx sr xs

Simplify the expression 10/11(22z) + (a+5) -1

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.