Slacks implies pants of certain materials which are not part of a suit (jeans are not slacks, and you would not refer to the pair of trousers that came with a suit as slacks.) It is also more common to use slacks to refer to pants worn by women, while men would wear trousers.
Health care safety net providers are those that have a legal mandate or mission to offer medical care to all patients, regardless of their ability to pay, and have a substantial number of patients who are uninsured or on Medicaid.
Your uninsured motorists coverage covers the following expenses: medical expenses and lost wages not fully paid by your no fault coverage, future medical expenses and future wage losses, and non-economic damages such as disability, pain and suffering, and the loss of ability to enjoy life.