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Quandaries & Queries
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 Topic: linear algebra
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 Finding the Line Joining Perpendicular Feet 2009-07-16 From mukulu:Please help I've been tryng to search in your data but i failed to get the solution Find the equation of a straight line joining the feet of the perpendiculars drawn from the point A(1,1) to the line 3x-3y-4= 0 and 3x+y-6=0.Answered by Janice Cotcher. Dividing money unequally 2007-02-06 From Linda:I have a total of \$13,826.48. It is to be divided by 15 kids - 2 of the kids only get half of what the other 13 do - how much do the 13 get and how much does the 2 get? ThanksAnswered by Haley Ess and Steve La Rocque. Nickels, dimes and quarters 2007-02-05 From Avinash:Mary has 48 coins made up of nickels, dimes and quarters with a total value of \$5.10. She has 4 more dimes than nickels and quarters combined. How many coins of each kind does she have? Use matrix to solve the systemAnswered by Stephen La Rocque. If the matrix A is inverible and AB =AC, then B = C 2002-03-27 From Vikki:i hope you can help i am soooo stuck here goes: a) ` A= 0 1 B= 1 1 c= 2 5 0 2 3 4 3 4 ` A,B and c are matrices Evaluate AB and Ac (which I can do) then b) I need to prove that if the matrix A is inverible and AB =AC, then B = C. Why does this not contradict what happened in part a)?Answered by Leeanne Boehm. Espaces vectoriels 2002-08-18 From Bacar:Comment montrer que trois (ou plus que trois) sous espaces vectoriels sont en somme directe.Answered by Claude Tardif.

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