Find the surface area of the prism.
12 in.
7 in.
4 in.
The surface area is
in. 2.

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

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.

3.4a=57.8 what is the the value of a