A. 33
B. 11
C. 22
D. 66

Answer:
x=11
Step-by-step explanation:
The median is 1/2 ( b1+b2) where b1 and b2 are the lengths of the bases
3x = 1/2(27+39)
3x = 1/2(66)
3x = 33
Divide each side by 3
3x/3 = 33/3
x=11