A circle has a diameter of 9.
What is the circumference of the kircle in feet?

C = 9pi or approximately 28.26

Step-by-step explanation:

We can find the circumference by using

C = pi*d

C = pi *9

We can approximate pi by 3.14

C = 3.14 * 9

      28.26

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:

44

step-by-step explanation: