Write an expression for a number that is 5 times greater than 2 For pre-algebra class

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Find the x coordinate of the point.

Can (2,3 and square root 10) be sides ona right triangle?

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.