Can someone give me the answer for this

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12

Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18 }, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.

What is the difference between –12 and –5? what is the distance between –12 and –7 on a number line? units