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

Plot the point on this function with an x-value of 6. What is the y-value of this point?
Maria is going to purchase cranberry juice and lemon-lime soda for a new fruit punch recipe. The recipe calls for 3.5 times as many bottles of lemon-lime soda a
Differentiate between an organic combustion reaction and an inorganic combustion reaction.
Solve the system of equations below by graphing. Type in the ordered pair (x,y) for your answer y=-2 x+y=5
1. Arc QR = Arc RS = 2. Find x and y -- if your answer is not a whole number, round to the tenths!
Plot the point on this function with an x-value of 6. What is the y-value of this point?
Choose ALL correct answers (1, -3) (4, 1) (6, 3) (2, -2)
Maria is going to purchase cranberry juice and lemon-lime soda for a new fruit punch recipe. The recipe calls for 3.5 times as many bottles of lemon-lime soda a
PLSS HELP MEEE!! It'll be very appreciated
1. Arc QR = Arc RS = 2. Find x and y -- if your answer is not a whole number, round to the tenths!