Answer:
A. [tex]\frac{1}{2} (120\degree-x)=48[/tex]
Step-by-step explanation:
By the amgle-chord-secant theorems.
[tex]m\angle L=\frac{1}{2} (m\overline{MN}-m\overline{JK})[/tex]
When we substitute the given measures we obtain:
[tex]48\degree=\frac{1}{2} (120\degree-x)[/tex]
This is the same as the first option.
Therefore the correct answer is A
