D. Y=2x I think I’m not exactly sure
When you subtract an integer from an integer you add it Ex: -30-40=-70
Answer:
The length of the radius of the circle K is 
Step-by-step explanation:
we know that
The triangle CDE is a right triangle with the 90 degree angle at point E
so
Applying the Pythagoras Theorem
Find the length of CD (diameter of the circle K)

substitute the values



Find the radius
Remember that the radius is half the diameter
so

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