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which of these systems of equations have a solution of (-12, 10)? selec…

Question

which of these systems of equations have a solution of (-12, 10)? select all that apply.
$y = -x - 2$
$-2x - y = 14$
$y = -3x - 26$
$y = 2x + 34$
$x = 12$
$x + y = -2$
$5x + 5y = -10$
$x - y = -22$
$3x + 4y = -4$
$y = -4x - 36$
$y = -5x - 50$
$y = 10$

Explanation:

Response

To determine which systems of equations have a solution of \((-12, 10)\), we substitute \(x = -12\) and \(y = 10\) into each equation of the system and check if both equations are satisfied.

System 1: \(y = -x - 2\) and \(-2x - y = 14\)
  • For \(y = -x - 2\):

Substitute \(x = -12\) and \(y = 10\):
\(10 = -(-12) - 2 = 12 - 2 = 10\). This is true.

  • For \(-2x - y = 14\):

Substitute \(x = -12\) and \(y = 10\):
\(-2(-12) - 10 = 24 - 10 = 14\). This is true.
So, this system has a solution of \((-12, 10)\).

System 2: \(y = -3x - 26\) and \(y = 2x + 34\)
  • For \(y = -3x - 26\):

Substitute \(x = -12\) and \(y = 10\):
\(10 = -3(-12) - 26 = 36 - 26 = 10\). This is true.

  • For \(y = 2x + 34\):

Substitute \(x = -12\) and \(y = 10\):
\(10 = 2(-12) + 34 = -24 + 34 = 10\). This is true.
So, this system has a solution of \((-12, 10)\).

System 3: \(x = 12\) and \(x + y = -2\)
  • For \(x = 12\):

The given \(x\) in the solution is \(-12\), not \(12\). So, this equation is false.
Thus, this system does not have a solution of \((-12, 10)\).

System 4: \(5x + 5y = -10\) and \(x - y = -22\)
  • For \(5x + 5y = -10\):

Substitute \(x = -12\) and \(y = 10\):
\(5(-12) + 5(10) = -60 + 50 = -10\). This is true.

  • For \(x - y = -22\):

Substitute \(x = -12\) and \(y = 10\):
\(-12 - 10 = -22\). This is true.
So, this system has a solution of \((-12, 10)\).

System 5: \(3x + 4y = -4\) and \(y = -4x - 36\)
  • For \(3x + 4y = -4\):

Substitute \(x = -12\) and \(y = 10\):
\(3(-12) + 4(10) = -36 + 40 = 4
eq -4\). This is false.
Thus, this system does not have a solution of \((-12, 10)\).

System 6: \(y = -5x - 50\) and \(y = 10\)
  • For \(y = -5x - 50\):

Substitute \(x = -12\) and \(y = 10\):
\(10 = -5(-12) - 50 = 60 - 50 = 10\). This is true.

  • For \(y = 10\):

The given \(y\) in the solution is \(10\), so this is true.
So, this system has a solution of \((-12, 10)\).

Final Answer

The systems of equations that have a solution of \((-12, 10)\) are:

  • \(y = -x - 2\) and \(-2x - y = 14\)
  • \(y = -3x - 26\) and \(y = 2x + 34\)
  • \(5x + 5y = -10\) and \(x - y = -22\)
  • \(y = -5x - 50\) and \(y = 10\)

Answer:

To determine which systems of equations have a solution of \((-12, 10)\), we substitute \(x = -12\) and \(y = 10\) into each equation of the system and check if both equations are satisfied.

System 1: \(y = -x - 2\) and \(-2x - y = 14\)
  • For \(y = -x - 2\):

Substitute \(x = -12\) and \(y = 10\):
\(10 = -(-12) - 2 = 12 - 2 = 10\). This is true.

  • For \(-2x - y = 14\):

Substitute \(x = -12\) and \(y = 10\):
\(-2(-12) - 10 = 24 - 10 = 14\). This is true.
So, this system has a solution of \((-12, 10)\).

System 2: \(y = -3x - 26\) and \(y = 2x + 34\)
  • For \(y = -3x - 26\):

Substitute \(x = -12\) and \(y = 10\):
\(10 = -3(-12) - 26 = 36 - 26 = 10\). This is true.

  • For \(y = 2x + 34\):

Substitute \(x = -12\) and \(y = 10\):
\(10 = 2(-12) + 34 = -24 + 34 = 10\). This is true.
So, this system has a solution of \((-12, 10)\).

System 3: \(x = 12\) and \(x + y = -2\)
  • For \(x = 12\):

The given \(x\) in the solution is \(-12\), not \(12\). So, this equation is false.
Thus, this system does not have a solution of \((-12, 10)\).

System 4: \(5x + 5y = -10\) and \(x - y = -22\)
  • For \(5x + 5y = -10\):

Substitute \(x = -12\) and \(y = 10\):
\(5(-12) + 5(10) = -60 + 50 = -10\). This is true.

  • For \(x - y = -22\):

Substitute \(x = -12\) and \(y = 10\):
\(-12 - 10 = -22\). This is true.
So, this system has a solution of \((-12, 10)\).

System 5: \(3x + 4y = -4\) and \(y = -4x - 36\)
  • For \(3x + 4y = -4\):

Substitute \(x = -12\) and \(y = 10\):
\(3(-12) + 4(10) = -36 + 40 = 4
eq -4\). This is false.
Thus, this system does not have a solution of \((-12, 10)\).

System 6: \(y = -5x - 50\) and \(y = 10\)
  • For \(y = -5x - 50\):

Substitute \(x = -12\) and \(y = 10\):
\(10 = -5(-12) - 50 = 60 - 50 = 10\). This is true.

  • For \(y = 10\):

The given \(y\) in the solution is \(10\), so this is true.
So, this system has a solution of \((-12, 10)\).

Final Answer

The systems of equations that have a solution of \((-12, 10)\) are:

  • \(y = -x - 2\) and \(-2x - y = 14\)
  • \(y = -3x - 26\) and \(y = 2x + 34\)
  • \(5x + 5y = -10\) and \(x - y = -22\)
  • \(y = -5x - 50\) and \(y = 10\)