Final answer:
The value of x is 9 and NM and OL are both 51 in the parallelogram LMNO.
Step-by-step explanation:
To find the value of x, we can set NM and OL equal to each other since opposite sides of a parallelogram are equal. Therefore, x + 42 = 5x + 6. Solve this equation for x:
4x = 36
x = 9
To find NM, substitute the value of x back into the equation: NM = 9 + 42 = 51
To find OL, substitute the value of x into the equation: OL = 5(9) + 6 = 51
Therefore, the correct answer is a) x=9, NM = 51, OL = 51.