Respostas

2013-10-10T14:21:56-03:00
F(x) = y
a) f(27) = 8x + 3 = 27
8x = 27 - 3
8x = 24
x = 24/3
x = 8

b) f(48) = 8x + 3 = 48
8x = 48 - 3
8x = 45
x = 45/8
x = 5,625