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Back to The Linear Combination Lemma

Exercise 14

Avg difficulty 3.0

Three truck drivers went into a roadside cafe. One truck driver purchased four sandwiches, a cup of coffee, and ten doughnuts for $8.458.45. Another driver purchased three sandwiches, a cup of coffee, and seven doughnuts for $6.306.30. What did the third truck driver pay for a sandwich, a cup of coffee, and a doughnut?

Hefferon, Linear Algebra, Linear Systems, The Linear Combination Lemma, Exercise 14

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Adapted from Linear Algebra © 2016 Jim Hefferon. Licensed under CC BY-SA 3.0 US. Source: Linear Algebra. Imported at revision df2262e.