Final answer:
The measure of ∠J cannot be determined without more information. Hence, The correct answer is option d) Not enough information provided to calculate ∠J.
Step-by-step explanation:
The question provides three expressions, 4x - 2, 5x - 3, and 10x - 20, but it does not provide any information about ∠J. Therefore, we cannot determine the measure of ∠J. The correct answer is option d) Not enough information provided to calculate ∠J.