MK is the same as NL.
Just read the rest of the questions.
They practically give you the answers.
Answer:
so its 50+.25(x) = y or 140. x is amount of minutes y is total
Answer:
1/5,1/4,1/20, yes, yes
Step-by-step explanation:
1)

2)

Here, the variable

can assume any value, and usually an inequality presented like this has

as a stand-in for all real numbers. If we really wanted to make that fact clear, we could write the two inequalities like this:

Formally, you'd read

as "

is an element of the set of real numbers," which is a fancy way of saying that

can be any real number.