Which of the following is the first step in calculating range?

Arrange the numbers in order of value.
Subtract the smallest number from the largest.
Add the smallest number to the largest.
Plot the data on a number line.

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:

no not all of them.

step-by-step explanation:

some of them have a square base.