anonymous
  • anonymous
A man starts his day with 79 bills totaling $4000 in all 100, 50, and 20 dollar bills. For lunch, he buys himself and friend lunch and tips generously. His bill comes to $2550. To pay for lunch, he uses all of his 100 dollar bills and half of his 50 dollar bills. Using this information, how many bills of each denomination did he start his day with?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
schrodinger
  • schrodinger
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anonymous
  • anonymous
that is a hell of a lunch !
anonymous
  • anonymous
good question too!
anonymous
  • anonymous
Must have been quite good! so do you have any ideas on this one?

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anonymous
  • anonymous
Got it, 100x+50y+20z=4000 100x+25y+0z=2550 x+y+z=79 solved as a matrix, reduced row echelon form gives x,y,z=16,38,25 16 100s, 38 50's and 25 20's

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