Respostas

2014-05-24T13:28:27-03:00
Perimetro2x+2y=70

x/y=2/5

5x=2y
2x+2y=70
5x=2y

2x+5x=70
7x=70
x=70/10
x=10

2.10+2y=70
20+2y=70
2y=70-20
2y=50
y=50/2
y=25

A=25x10A=250m²
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