9514 1404 393
Answer:
B) 12
Explanation:
The base is twice the length of the midline.
QS = 2·YZ
3x -8 = 2(x +2) . . . . . . . substitute given values
3x -8 = 2x +4 . . . . . . eliminate parentheses
x = 12 . . . . . . . . . . . add 8-2x
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