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Answer:
C) 22
Step-by-step explanation:
The length of the mid-segment MN is half the length of KL.
x - 4 = ½(x + 7)
Multiply each side by 2 2x - 8 = x + 7
Add 8 to each side 2x = x + 15
Subtract x from each side: x = 15
KL = x + 7 = 22