You are paid $7.45/hr at your part-time job. your deductions are fica (7.65%), federal tax withholding (10.65%), and state tax withholding (5.7%). your travel expenses are $5.70 per day worked. you work 12 hours over a 3-day period of time. what is your net income after travel expenses?

12 hrs @ 7.45/hr = 89.40

I will assume that you deduct your expenses before taxes. In that case, the taxable income is

89.40 - 3*5.70 = 72.30

Now for the tax bite. Total tax rate is

.0765 + .1065 + .057 = .24
tax is thus .24*72.30 = 17.35

Subtract that, and your net income is

72.30-17.35 = 54.95

You could do it all in an equation, but it's easier to see by steps. In an algebraic expression, that would be

(12*7.45-3*5.70)(1-(.0765+.1065+.057)) = 54.95

sorry I type slow xd but I tried :)))
Hope this helped!! <3