does the ordered pair (-4,-7) satisfy the system of linear equations?
-7x-7y=77
4x+5y= -52
2007-06-10 10:59:09 · 5 answers · asked by :) 5 in Science & Mathematics ➔ Mathematics
First: replace/substitute the numbers with the corresponding variables in the 1st equation.
- 7x - 7y = 77
- 7(-4) - 7(-7) = 77
28 + 49 = 77
77 = 77
True
Sec: replace/substitute the numbers with the corresponding variables in the 2nd equation.
4x + 5y = -52
4(-4) + 5(-7) = -52
-16 + (-35) = -52
- 16 - 35 = -52
- 51 = - 52
False
No, the ordered pair doesn't satisfy the system of linear equations.
2007-06-10 11:09:11 · answer #1 · answered by ♪♥Annie♥♪ 6 · 3⤊ 0⤋
NO
(-7)*(-4 )- 7*(-7) = 77
and
4*(-4)+5*(-7) = -51, which does not equal to -52.
2007-06-10 18:03:07 · answer #2 · answered by Wen 1 · 0⤊ 0⤋
No. It satisfies the 1st equation but not the 2nd..
2007-06-10 18:08:16 · answer #3 · answered by ironduke8159 7 · 0⤊ 1⤋
put -4 in for x in both equations
then put -7 in both equations
solve.
if they both check then it works.
hint:answer is no
2007-06-10 18:08:11 · answer #4 · answered by guitarp11 5 · 0⤊ 0⤋
no,
but if you want to know how to do it,
just substitute in -4 for x
and -7 for y.
2007-06-10 18:41:53 · answer #5 · answered by ♥oh*em*gee♥ 4 · 0⤊ 1⤋