Which answer choice is equivalent to he sum of the polynomials below? (10*+-6)+(2x^2-9x-12) A. 3(4x-^2+6) B. 6(x-3) C. 6(2x^2-x-3) D. 18(x^3-1)​

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.

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters