Answer:
C
Step-by-step explanation:
The angles of any triangle add up to 180 degrees.
[tex]8x + (7x+2) + (4x+7) = 180 \\ 19x+9=180 \\ 19x=181 \\ x=9[/tex]
Putting this value into the expressions for the angle measures:
[tex]m\angle J=7x+2=65 \\ m\angle K=8x=72\\m\angle L=4x+7=43[/tex]
