Answer:
n=6
Step-by-step explanation:
[tex]Intesecting \ Chord \ Theorem[/tex]-When two chords intersect each other inside a circle, the products of their segments are equal.
The chord segments are given as (5,n+8) and (7,n+4)
[tex]5(n+8)=7(n+4)\\5n+40=7n+28\\2n=12\\n=6\\[/tex]
The value of n is 6