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

Taxation without representation is tyranny. Why did James Otis make this statement? He believed that America's representatives in Parliament were corrupt. He wa
Write the equations of two lines whose graphs are perpendicular to one another
Most people dislike paying taxes; although, taxes pay for services that most people like //whats the error
what reason did hitler give for attempting to annihilate the jewish people?
what is 1/4 of 24 solve using a tape diagram
67% of 8.7 = ___ estimate
The Eisenhower administration’s major domestic legislative accomplishment in the 1950s was the passage of a law __________. providing medical insurance for seni
Chemistry: counting atoms in compounds worksheet #7.0.1 Answer please!!!!!
Which Enlightenment philosopher promoted the principles of separation of church and state along with freedom of the press?
Which military strategy did the United States adopt upon entering World War II? It sent most of its military force into the Pacific to block further Japanese ex