Respuesta :
Answer: 55-3m
Step-by-step explanation:
Given: Sarah received $55 dollar sign,for her birthday.
Therefore, the total money she had=$55
Since she used some of that money to buy 3 shirts priced at m dollars each.
Then the total amount she spent =3 times m=3m
Now, the amount of money she had left = 55-3m (in dollars)
Hence the required expression is 55-3m