is it:
a.(11,1)
b.(3,-3)
c.(-1,-5)
d.(1,-4)
2007-05-02 19:30:16 · 5 answers · asked by iluvbradley10125 1 in Science & Mathematics ➔ Mathematics
4x = 4
x = 1
3 + 2y = - 5
2y = - 8
y = - 4
Option d
2007-05-02 19:40:13 · answer #1 · answered by Como 7 · 0⤊ 0⤋
x - 2y = 9 (equation 1)
3x + 2y = -5 (equation 2)
Add the two equations to get
4x = 4
so x = 1
Substitute x=1 in equation 1 to get
1 - 2y = 9
1 - 9 = 2y
-8 = 2y
so y = -4
So the co-ordinates are (1,-4) and the answer is choice D
2007-05-02 19:47:33 · answer #2 · answered by Anonymous · 0⤊ 0⤋
eqn a million: x -2 y = 9 eqn 2: 3 x +2 y = -5 multiply eqn a million via 3 and eqn 2 via a million eqn 3: 3 x -6 y = 27 eqn 4: 3 x +2 y = -5 sub eqn 4 from eqn 3 eqn 4: -8 y = 32 y = (32)/(-8) = -4 x = (9-(-2)(-4) )/(a million) = a million intersect factor is (a million,-4)
2016-12-28 08:56:59 · answer #3 · answered by lisk 3 · 0⤊ 0⤋
a. 11, 1
2007-05-02 19:33:45 · answer #4 · answered by vanilla zaraberi 3 · 0⤊ 0⤋
4x=4
x=1
1-2y=9
2y=-8
y=-4
(1,-4)
2007-05-03 01:23:31 · answer #5 · answered by shiva 3 · 0⤊ 0⤋