Math121 discussion - 3rd week answers

Math121 discussion - 3rd week answers - z =-20 3 x + 12 y-6...

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MATH 121 DISCUSSION WEEK 3 SOLUTIONS 1) (1) P d = - 2 3 Q + 107 6 (2) P s = 3 7 Q + 2 . 50 (3) Q e = 14 , 000, P e = $8 . 50 (4) P = 3 7 Q + 1 2) (1) Our new systems looks like the following: x - 3 y + z = 3 10 y - 3 z = 20 x - 5 3 y + 2 3 z = 1 3 (2) ( x,y,z ) = (2 , 5 , 10) 3) (1) The corresponding system of equation is as follows: 2 x + 5
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Unformatted text preview: z =-20 3 x + 12 y-6 z = 9-5 x + 4 y = 29 (2) ( x,y,z ) = (-5 , 1 ,-2) 4) A bag of dog food costs $20.00. (A tube of toothpaste costs $6.00, and a jar of vitamins costs $9.00) 1...
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