Stitz-Zeager_College_Algebra_e-book

Our solution is 39 91 26 117 26 5 4 13 19 9 5

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Unformatted text preview: es discussed in this section. Compare and contrast these techniques with those you used to solve the systems in the Exercises in Section 8.1. −5x + y = 17 2x − y + z = −1 (a) 4x + 3 y + 5 z = 1 x+y = 5 (f) 5y + 3z = 4 x+y+z = 3 2x − y + z = 0 (b) x − y + z = −4 −3x + 5y + 7z = 7 −3x + 2y + 4z = −5 (g) x − 5y + 2z = −18 4x − y + z = 5 2y + 6z = 30 (c) 2x − 4y + z = −7 x+z = 5 x − 2y + 2z = −2 (h) 7 −x + 4y − 2z = 3 x − 2y + 3 z = −3x + y + 2z = −5 (d) 2x − y + z = 1 2x + 2 y + z = 3 2x + 2y − z = 1 (i) 3x − 2y + z = −5 3x + 6 y + 4 z = 9 x + 3y − z = 12 (e) x + y + 2z = 0 474 Systems of Equations and Matrices x − 3y − 4z = 3 3x + 4y − z = 13 (j) 2x − 19y − 19z = 2 4 x+y+z = 2x − 4y − z = −1 (k) x−y = 2 x−y+z = 8 3x + 3y − 9z = −6 (l) 7x − 2y + 5z = 39 2x − 3y + z 4x − 4y + 4z (m) 6x − 5y + 7z x1 − x3 2x2 − x4 (n) x1 − 2x2 + x3 −x3 + x4 = −1 = −13 = −25 = −2 = 0 = 0 = 1 4. Carl wants to make a party mix consisting of almonds (which cost $7 per pound), cashews (which cost $5 per pound), and peanuts (which cost $2 per pound.) If he wants to make a 10 pound mix with a budget of...
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