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Answer:
0.0009
Step-by-step explanation:
1 is D, an angle bisector only cuts the original angle in half.
2 is
9x - 18 = 3x
6x - 18 = 0
6x = 18
x = 3
3 is 9(3) - 18 = 27 - 18 = 9

Length of the room is 5 m and width is 5 + 2 = 7 m.
Hope this helps.
r3t40