Afour-sided polygon has sides that measure (2x + 1), (4x – 10), (x + 1)and (12x + 25). what is the perimeter of the polygon, in terms of x?

The perimeter would be found by adding all 4 of these expressions together, remembering that we can combine like terms.  Here is what it would look like:
(2x+1)+(4x-10)+(x+1)+(12x+25).  The bold parts are terms that can be combined together and all the other numbers (constants) can be combined.

2x+4x+1x+12x=19x
1+ (-10)+1+25 = 17
19x+17 would be the simplified expression that represents the perimeter.

Iam not sure but i think the answer is b