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

Which of the following could be the equation for a parabola that opens to the left with vertex (-17,2)?
m∠B =? degrees why do u think that?
Solve and check: -23 = 3x - 5 find X
help me out please :)
What simple idea was the basis of the agricultural adjustment act?
Jack is mowing lawns he mows lawns at a constant rate of 1/3 acre every 3/4 hour at this rate which ffraction re;presents the acres jack can mow per hour
WILL MARK BRAINLIEST [tex][/tex]What sent the message that the federal government would not allow a state to go its own way without a fight?a.suffragec.Force Bi
Which of the following tables represents a ratio which is greater than the ratio in the table above?
At the market,7 apples cost $4.55. What is the cost per apple?
The ability to learn and transfer knowledge to others is called _____.​