Answer:
6
Step-by-step explanation:
All we need to do is pythagoras theorem. 4sqrt5 is the hypotenuse and 4 is a leg, (4sqrt5)^2 - 4^2 = 36. Sqrt36 is 6.
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8 = 4x OR 0 = 4x
I not %100 sure or it could be 0 = 4x
EITHERONE