> Is it reasonable that she take her resume to this business and negotiate for a better wage if they might be interested in having her work for them?
It may depend (on 'Supply and Demand').
1.) Are there more well qualified applicants of this character (willing to take the offered pay rate) than there are jobs to go around? Then my money's on: "she'll be shown the door". [I think her energy's better placed on continuing to look if she must have more.]
2.) Are there more jobs of this character then there are well qualified applicants (interested at the pay level offered) to fill such jobs? Then my money's on: "they'll talk to her, and maybe negotiate something".
Of course, there's usually no harm in trying to negotiate something if $15/hr is simply impossible for her (as, she's nothing to lose in the asking while risking insulting the employer).
> She has a mortgage, car payment and a child to raise on her own and can't afford to live on $15 an hour.
Sure. But, how much does Employment Insurance pay and subsequently zero income compare, with a paying position of $15/hr, though? And, could she: sell the home and rent? Downgrade the car or manage without a car? Cut costs left, right and center?
Since she's not tied down by a job to her present area, could she move to: better employment opportunities for her qualifications (sell her home); and/or, move to a less expensive area to live in? $15/hr x 37(?)hrs/week x 52 wks/yr = $29,000/year.
Which, suggests her optimal housing costs on such a salary (renting or owning) ought to be on the order of 30% of her gross income or around $9,000/yr ($700/mo, a typical one bedroom apt. in many but not all areas, but she has a child and would rather live in a two bedroom apartment I'd imagine).
Don (former business owner)
ps. I'd be annoyed at job applicants wanting 'more' than the advertised position offers, unless I were desperate. (I'd see it as a sign they'd likely be more trouble than they're worth if they then 'settled' for the advertised amount.)