Respuesta :

Answer:

  y = -3

Step-by-step explanation:

Take the antilog:

  (y +5)² = 20/5

  y +5 = √4 = 2 . . . .  take the positive square root

  y = -3 . . . . . . . . . . . subtract 5

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The applicable rules of logarithms are ...

  log(a/b) = log(a) -log(b)

  log(a^b) = b·log(a)