I don't know man my teacher is gonna have to deal with me leaving this blank lol.
Answer:
4x-20 is the same as x+x+x+x-20
we know that
total of sum of arc is 360
so, sum of both arc must be 360
so, we get

now, we can solve for x

............Answer
3<9h I hope this helps you
The outlier would be shown as a dot so the answer is B. 45
The interquartile range is 28 - 18 = 10
A simple rule is that points more than 1.5xIRQ above or below the medians is an outlier and is shown as a point.
28 + 1.5x10 = 43. 45 is above this value.