Answer:The expression representing Tanya's age is
3x + 12
Explanation:
Gabriella is x years old.
Her sister,Felicia is six years older than she is. This means that Felicia's age would be x + 6
Their mother is twice as old as Felicia. It means that their mother's age would be 2(x + 6) = 2x + 12
Their aunt,Tanya,is x years older that their mother. It means that Tanya's age would be
2x + 12 + x = 3x + 12