X+x+x+x would just be 4x because there are 4 x's
The midpoint of a line divides the line into equal segments.
The option that proves PQ = LO is (a)
The given parameters are:




P is the midpoint of LM.
So, we have:



Q is the midpoint of NO.
So, we have:



Distance PQ is calculated as follows:

This gives:



Distance LO is calculated as follows:



So, we have:


Thus:

Hence, the correct option is (a)
Read more about distance and midpoints at:
brainly.com/question/11231122
The slope for that is undefined.
I know that the first one is the (sum) of a number x and 8.1 but im not sure about the rest im sorry