For this case we have that the surface area of the prism is given by:

Where:
: Is the lateral area
B: It is the area of the base

Where:
Q: It is the perimeter of the base
h: It's the height

On the other hand:

So, we have:

Answer:

All you have to do is combine like terms here...all the x's and then all the constants. 2.3x + 2x -.2x = 4.1x; 14 + 15 = 29, so the perimeter is 4.1x + 29, A above.