In the data set below, what is the upper quartile?

62 42 18 42 66 42 67 89
88 14 87 59

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

the square root of what number? if you add that, then someone will probably answer the question.