Warm-up: Solve the system: 𝑥−2𝑦−𝑧=−5 2𝑥+𝑦+𝑧 =5 𝑥−2𝑦−𝑧=−5 2𝑥+𝑦+𝑧 =5 CW!!!: page 605 (9 – 21 odd)

HW Answers: page 605 (1 – 6 all, 8 – 22 even) 1) (1, -2, 4) 2) (2, -3, -2) 3) (1, 2, -2) 4) (8, -2, 6) 5) (1/2, -2, 2) 6) (-2, -10/3, -4) 8) x – 2y + 3z = 5 -x + 3y – 5z = 4 4y – 9z = -10 10) (0, 4, -2) 12) (-2, -11, -10) 14) (1/2, -3/2, 1) 16) Inconsistent 18) (3/10, 2/5, 0) 20) − 1 2 𝑎+ 5 2 , 4𝑎 −1, 𝑎 22) 13 −4𝑎, 45 2 − 15 2 𝑎, 𝑎

𝑥−𝑦+𝑧=0 2𝑥−3𝑦−𝑧=2 −𝑥+2𝑦+3𝑧=−3 Sneedlegrit: Solve the system: 𝑥−𝑦+𝑧=0 2𝑥−3𝑦−𝑧=2 −𝑥+2𝑦+3𝑧=−3 CW!!!: page 605 (9 – 21 odd)