Respuesta :

fieryanswererft

Answer:

given below

Step-by-step explanation:

Valid:

  • n * 5 = 5n .....1st option
  • n(1+1+1+2) ........4th option
  • n * 5 = 5n ............5th option
  • 1*n+1*n+1*n+2*n ........sixth option

Invalid:

  • 1(n + 2n) ............3rd option
  • 0*n+0*n+0*n+2*n ...............2nd option