Does anybody know how to work this out?

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

What’s -11-33k and factor each expression completely

Consider u = {x|x is a negative real number}which is an empty set? o {x|x eu and x has a negative cube root}o {x|x eu and x has a negative square root}{x|x eu and x is equal to the product of a positive number and -1}{x|x eu and x is equal to the sum of one negative and one positive number?