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(13, -6.5)

Step-by-step explanation:

Find the distance between points J and the midpoint, which is 8.5 for x-coordinates and 2.5 for y-coordinates.

Add these values to the midpoint coordinates to get the coordinates of point K

4.5 + 8.5 = 13

-8.5 + 2.5 = -6.5

The coordinates of point K are (13, -6.5)

f is the midpoint of

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

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