2/3x - 5/6 equal to or greater than 1/2

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.

Common binomial factor of 6x(3x+7)+5(3x+7)

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122