Respostas

2013-12-08T20:45:20-02:00
Diretamente proporcional a 8 e 15

8+ 15 = 23    280 / 23 = 12,17391304347826

12,17391304347826 x 8 = 97,39130434782609
12,17391304347826 x 15 = 182,6086956521739

182,6086956521739 + 97,39130434782609 = 280
inversamente 1/5 + 1/2 => 7/10 

(280)/(7)/(10) =>> 280*10/7 => 2800/7 = 400

1*400/2 = 200

1*400/5 = 80 

200 + 80 = 280
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