Final answer:
Mary's taxable income for 2017, assuming she has $6,150 of earned income and $800 of unearned income and is claimed as a dependent by her parents, would be $6,950.
Step-by-step explanation:
Mary's taxable income for 2017 can be calculated by subtracting any applicable deductions and exemptions from her total income. As a dependent, she may not be eligible for certain deductions that would lower her taxable income. However, assuming she does not have any deductions or exemptions, her taxable income would be the sum of her earned income and unearned income.
Therefore, Mary's taxable income for 2017 would be $6,150 (earned income) + $800 (unearned income) = $6,950.