meababy2009ow9ewa meababy2009ow9ewa
  • 12-02-2018
  • Mathematics
contestada

1. Solve the system by the elimination method. Check your work. R - 9S = 2 3R - 3S = -10 {(-4, -8/3)} {(-4, -3/2)} {(-4, -2/3)}

Respuesta :

Аноним Аноним
  • 12-02-2018
R - 9S = 2 --------- (1) 
3R - 3S = -10 -----(2)

(1)x 3
3R - 27S = 6 --------(1a)

(1a) - (2):
-3s - ( -27s) = -10 - 6
- 3s + 27s = -16
24s = -16
s = -2/3 ---- sub into (1)
R - 9(-2/3) = 2
R + 6 = 2
R = 2 - 6
R = -4

Ans: R = -4, S = -2/3 [Answer: (-4, -2/3) ]
Answer Link
cineusstanleyy cineusstanleyy
  • 12-02-2018
the correct answer for R and S are
R = - 4
S = - 2/3

( -4, - 2/3)
Answer Link

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