blair’s bank account was overdrawn by $40. she spent $30 at the grocery store. what is the balance i

blair’s bank account was overdrawn by $40. she spent $30 at the grocery store. what is the balance in her account now?

The word overdrawn means a negative balance. So we start with:
-40

Spending 30 at the grocery store means we subtract 30 from our initial balance:
-40 - 30 = -70 or $70 overdrawn