What is the perimeter of a regular pentagon in which all sides have a length of 7 feet?
49 ft
28 ft
35 ft
42 ft

The answer is 35 ft.

Step-by-step explanation:

Since a pentagon has 5 sides, we will multiply that by 7 and we get 35.  

x divided by 8=y

step-by-step explanation:

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: