SOLUTION: Your friend's mother plans to open a restraunt. The initial investment is $90,000. Weekly expenses will be about $8200. If the weekly income is about 8900, in how many weeks will s

Question 165812This question is from textbook Algebra 2
: Your friend's mother plans to open a restraunt. The initial investment is $90,000. Weekly expenses will be about $8200. If the weekly income is about 8900, in how many weeks will she get back her investement? This question is from textbook Algebra 2

Found 2 solutions by Mathtut, gonzo:
Answer by Mathtut(3670) (Show Source): You can put this solution on YOUR website!
take the income per week and subtract the expenses per week 8900-8200 which equals 700. now since this is on a weekly basis our unknown of how many weeks we will call w. So 700/wk times w(# of weeks) must equal the orignal investment of 90000. 700w=90000...w=128.57 weeks to get back her initial investment.
Answer by gonzo(654) (Show Source): You can put this solution on YOUR website!
initial investment = 90000
weekly income = 8900
weekly expenses = 8200
weekly profit = 8900 - 8200 = 700
if we assume either no taxes or the weekly income is after taxes have been paid, then she will get her money back in 90000/700 weeks.
that equates to 128.5714286 weeks
round to the nearest whole week, she will make her money back in the 129th week.

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