A square flower garden has a perimeter of 10 feet. Duncan uses stones to edge the garden. Each stone is one-half-foot long. How many stones will Duncan need to edge the garden? Solve this problem any way you choose.

20 stones

Step-by-step explanation:

The perimeter of the garden is 10 feet.

He uses stones that are 1/2 foot long each to edge the garden.

The number of stones he will need can be gotten by simply dividing the perimeter of the garden by the length of each stone:

10 / 1/2 = 20 stones

He will need 20 stones.

 3

Step-by-step explanation:

When a variable is directly varies to variable y , then the equation for direct  variation is given by :_

                               (1)

, where k is the constant of variation.

We are given that ,

Y is directly related to X , and Y is 81 when X is 27.

Put x= 27 and y= 81 in (1) , we get

Divide both sides by 27  , we get

  or

That is , the constant of variation = 3