9. (from Mathews-Fink 2004) The Rockmore Corp. is the considering the purchase o

Question

9. (from Mathews-Fink 2004) The Rockmore Corp. is the considering the purchase of a new computer and will choose either the DoGood 174 or the MightDo 11. They test both computers' ability to solve the linear system 34x +55y-210 55r +89u -34 0 The DoGood 174 computer gives 0.11 and y 0.45, and its check for accuracy is found by, substitution: 34(-0.11) +55(0.45)-21-0.01 55(-0.11) +89(0.45)-34 0.00 The MightDo 11 computer gives9 and y 1.01, and its check for 34(-0.99)+55(1.01) 21 0.89 accuracy is found by substitution: 55(-0.99)+89(1.01)-34 1.44 Which computer gave the better answer? Why?

Explanation / Answer

DoGood 174 gives the better answer because percentage errors is less than the percentage error in MightDo 11 computer

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