Answer:
This equation can be solved by using y = kx.
Since y = 25 when x = 60,
25 = 60k and if we solve for k then k= 5/12.
That means the equation we're using is
y = (5/12)x.
Plug in y = 30 and you get
30 = (5/12)x
Solve for x
30 * (12/5) = x
360/5 = x
x = 72
41ft is your answer
left side=√(12²+12²)=16.97=17ft
perimeter=sum of all side=12+12+17=41ft
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