Answer:
the required expression is 55-3m
Explanation:
Sarah received $55 dollar sign,for her birthday.
Therefore, Sarah had the total money of $55
she used some of that money to buy 3 shirts priced at m dollars each.
Then the total amount she spent =3 multiply by m
which equals to 3m
Now, the amount of money she had left
The amount of money Sarah has left would be the total she had MINUS what she spent on 3 shirts. That would be:
= 55-3m (in dollars)
Remaining Money = 55 - 3m
Hence, the required expression is 55-3m