9514 1404 393
Answer:
(d) 12
Explanation:
For intersecting chords, the product of segment lengths of each chord is a constant.
10x = 8(3 +x) . . . . . chord relation
10x = 8x +24 . . . . eliminate parentheses
2x = 24 . . . . . . . . subtract 8x
x = 12 . . . . . . . . . divide by 2