Sophinacons6hieFur Sophinacons6hieFur
  • 01-12-2016
  • Mathematics
contestada

Which ordered pair is the solution to the system of equations?

{2x+y=−8
{x−y=−4

(1, 5)
(−3, −2)
(−4, 0)
(−1, 3)

Respuesta :

wizard123
wizard123 wizard123
  • 01-12-2016
Lets solve this with elimination.
Add both equations together, you will notice the y terms cancel each other out because "y-y = 0". This is what we want.

The result is:
[tex]3x = -12[/tex]
Divide both sides by 3
[tex]x = -4[/tex]

To find y-value, plug in x=-4 into 1st equation:
[tex]2(-4) +y = -8[/tex]
-8 +y = -8
y = 0

Solution is  (-4,0)
Answer Link

Otras preguntas

PLEASE HELP I WILL GIVE THE BRAINLIEST !!!!!!!!! Why was it difficult for Gálvez to keep supplying the Americans with goods? O There were British spies in New
Why is communication with your teacher important?
7th-grade math help me, please :(
there are TWO '6s' in the amount $8 614 160.Write down the amount of the money that each 6 represents ​
Which statement describes the graph of f(x) = [x]-2 on [0, 3)?
Give and example of a pure market economy:
areas with highest population density in europe
How does the electoral college also show the use of federalism?
me Review Simplify the expression. Explain each sia 1. 2 + (5 + y)
Kinetic energy in a substance is defined as