Question 155739
Perimeter of a Square: {{{P=4s}}} where "P" is the perimeter and "s" is the side length



{{{P=4s}}} Start with the general formula for the perimeter of a square



{{{P=4(y-3)}}} Plug in the given side length of {{{s=y-3}}}



{{{P=4y-12}}} Distribute



So the perimeter is {{{P=4y-12}}}



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Area of a Square: {{{A=s^2}}} where "A" is the area and "s" is the side length



{{{A=s^2}}} Start with the general formula for the area of a square



{{{A=(y-3)^2}}} Plug in the given side length of {{{s=y-3}}}



{{{A=y^2-3y-3y+9}}} FOIL



{{{A=y^2-6y+9}}} Combine like terms.



So the area is {{{A=y^2-6y+9}}}