Respuesta :

put g(x) inside the equation of f(x)
y=---/(7x+b)
plug in the coordinates of x and y
6=--/(7(4)+b)
and then get b alone
(6)^2=(--/(28+b))^2
  36=28+b
-28  -28
--------------- subtract 28 from both sides
8= b
A is the answer