Respuesta :

Answer:

8x+7

Explanation:

f(x) = x + 3

g(x) = 7x + 4

==========

  • (f+g)(x)
  • f(x) + g(x)
  • x + 3 + 7x + 4
  • 8x + 7
  • (f+g)(x)
  • f(x)+g(x)

Put values

  • x+3+7x+4
  • 8x+7

Done!