Answer:
Perimeter: [tex]p = 4\cdot l[/tex], Total costs: [tex]C = 24\cdot l[/tex]
Step-by-step explanation:
The garden has a square form. Let be [tex]l[/tex] the length of any of the sides, measured in yards. The perimeter of the garden, measured in yards, is:
[tex]p = 4\cdot l[/tex]
Now, perimeter has a length unit and total costs of edging the garden, measured in US dollar, is:
[tex]C = \left(6\,\frac{USD}{yard} \right)\cdot 4\cdot l[/tex]
[tex]C = 24\cdot l[/tex]