hello1239458585 hello1239458585
  • 09-06-2019
  • Mathematics
contestada

Which system of equations has a solution of approximately (-0.4,1.1)?
A. x+3y=3 and 2x-y=-2 B.x-3y=-3 And 2x+y=2
C. x-3y=-3 and 2x-y=-2
D. x+3y=3 and 2x+y=2

Respuesta :

tztfsf
tztfsf tztfsf
  • 09-06-2019

Answer:

Step-by-step explanation:

Solve each equation individually, using substitution or elimination.

A. x + 3y = 3

   2x - y = -2

Substitute:

2(3-3y) - y = -2

6-6y-y = -2

6-7y = -2

y = 8/7

plug it back in to the first equation:

x + 24/7 = 3

x = -0.4285, approximately, and since this rounds to -0.4 and 8/7 approximately equals 1.1,

A is your answer.

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aubreyhudson424 aubreyhudson424
  • 08-01-2021

Answer:a

Step-by-step explanation:

Don’t ask how Ik . I just know

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