Choose the ordered pair that is a solution to the system of equations.
3x - y = 9
2x + y = 6
(3,0)
(3,-18)
(3,-1)
(3,1)
2006-08-24 10:36:08 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
The first one (3,0) is correct. Substitute the numbers for x and y into each equation, and see which pair makes the equations true.
Now, do your own homework!
2006-08-24 10:39:51 · answer #1 · answered by Pangolin 7 · 1⤊ 0⤋
Adding you get 5x=15 => x=3
Plugging this in you get 3*3-y=9 => 9-y=9 => -y=0 => y=0
So your answer is (3,0)
2006-08-24 10:40:10 · answer #2 · answered by maegical 4 · 1⤊ 0⤋
3x - y = 9
2x + y = 6
From the second equation y = 6 - 2x
If you substitute in the first equation
3x -6 +2x = 9
5x = 15
x= 3
Substitute 3 for x in the first equation
9-y=9
y=0
Proof
3x - y = 9 (substitute x=3 y = 0) 9-0=9
2x + y = 6 (substitute x=3 y = 0) 6 + 0 = 6
2006-08-24 10:46:57 · answer #3 · answered by Anonymous · 1⤊ 0⤋
(3,0)
look at the method i mentioned in a similar previous question.
2006-08-24 10:43:07 · answer #4 · answered by Srishta C 1 · 1⤊ 0⤋
very lazy it's the 1st option(3,0)
are you preparing questionaire for 3rd standard student.
2006-08-24 10:43:47 · answer #5 · answered by rx.vinay.ph 2 · 1⤊ 0⤋
It's unanimous (3,0)
2006-08-24 11:52:18 · answer #6 · answered by MollyMAM 6 · 0⤊ 0⤋
(3,0)
2006-08-24 10:54:41 · answer #7 · answered by Ja mone` 2 · 1⤊ 0⤋
(3,0)
2006-08-24 10:40:09 · answer #8 · answered by Anonymous · 1⤊ 0⤋