Final answer:
To find how much of Rachel's monthly income is left, subtract her expenses from her income.
Step-by-step explanation:
To determine how much of Rachel's monthly income is left, we need to subtract her expenses from her income. Her income for July is $3300. Her expenses include $1000 for rent, $150 on student loans, $100 for a new tablet, and $450 on groceries. To find the remaining amount, we subtract the total expenses from her income: $3300 - ($1000 + $150 + $100 + $450) = $3300 - $1800 = $1500. Therefore, Rachel has $1500 of her monthly income left.