Respostas

2014-04-10T09:18:30-03:00
Y = 3,80x + 7,20
y = 3,80.11 + 7,20
y = 41,80 + 7,20
y = 49,00
2014-04-10T09:20:39-03:00
 3,80 x 11 =41,80 +7,20=48,00 reais