Answer: B. Cannot be determined
Explanation:
We can't use SAS since we don't have two pairs of proportional sides. We only know one pair of sides. This also rules out SSS as well since we'd need 3 pairs of proportional sides.
We can't use AA because we don't have two pairs of congruent angles.
Currently, we simply don't have enough information to determine if the triangles are similar or not.
-9x is the answer to your question
The area of a rectangle is given by the length times the width of the rectangle.
Thus the area of the given rectangle is given by:

T=5.25n......................