Question 110105
A) L*w=a
B) (L-4)(w-2)=a-74
C) L-4=w-2
L=w+2
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A) (w+2)*w=a
w^2+2w=a
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B) (w+2-4)(w-2)=w^2+2w-74
(w-2)(w-2)=w^2+2w-74
w^2-4w+4=w^2+2w-74
-6w=-78
w=13 cm
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C) L-4=13-2
L-4=11
L=11+4
L=15 cm
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A) 13*15=195 cm^2
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Answer: w=13, L=15
That was hard!
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A)L*w=a 
(w+5)w=a
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B) w(w-5)=330
w^2-5w=330
w^2-5w-330=0
w=20.84 m (approx.) quadratic formula (the other answer was negative)
L=25.84 m approx
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25.84*20.84=538.37 m area of park.
20.84*15.84=330 m area of flower border.
538.37-330=208.37 m^2 area of lawn. Ans.
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Ed