hw2-1 - All variable terms should be on the left side of...

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Math 1160 – Section 2.1 Answer Key 6. -3y + 7z = 2 **3rd Equation** + 3y + 9z = 3 **2nd Equation Multiplied by 3** 16z = 5 **New 3rd Equation** 8. 0 4 8 5 [3] + 0 -4 8 -12 (-4)[2] 0 0 16 -7 New [3] 10. Take row 2 in the matrix and add to it –4 times row 1 resulting in a new row 2. 14. - 5 4 6 1 16. - 8 0 3 1 4 4 [2] + -4 -12 (-4)[1] 0 -8 New [2] 32. x = 1, y = 2, z = 3 (Make sure your equations are in the proper form before converting the data to matrix form!
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Unformatted text preview: All variable terms should be on the left side of the = sign, and all constant terms should be on the right side of the = sign.) 36. x = 1, y = 2, z = 3 40. Brand A Calculators (x) = 8 Brand B Calculators (y) = 12 x + y = 20 (counts) 80x + 95y = 1780 (costs) 50. Savings (x) = $1250 CD (y) = $1250 Pre-paid College Fund (z) = $2500 x + y + z = 5000 .03x + .06y + .075z = 300 -x - y + z = 0 (z = x + y)...
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This note was uploaded on 05/21/2008 for the course MATH 116 taught by Professor Copeland during the Spring '08 term at Western Michigan.

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