Which statements are true about the ordered pair (−4, 0) and the system of equations?

{2x+y=−8x−y=−4

Select each correct answer.

Responses

The ordered pair (−4, 0) is a solution to the first equation because it makes the first equation true.
The ordered pair begin ordered pair negative 4 comma 0 end ordered pair is a solution to the first equation because it makes the first equation true.

The ordered pair (−4, 0) is a solution to the second equation because it makes the second equation true.
The ordered pair begin ordered pair negative 4 comma 0 end ordered pair is a solution to the second equation because it makes the second equation true.

The ordered pair (−4, 0) is not a solution to the system because it makes at least one of the equations false.
The ordered pair begin ordered pair negative 4 comma 0 end ordered pair is not a solution to the system because it makes at least one of the equations false.

The ordered pair (−4, 0) is a solution to the system because it makes both equations true.
The ordered pair begin ordered pair negative 4 comma 0 end ordered pair is a solution to the system because it makes both equations true.

1 answer

To determine which statements about the ordered pair (−4, 0) and the system of equations are true, we need to check if this ordered pair satisfies both equations:

  1. First equation: \(2x + y = -8\)
  2. Second equation: \(x - y = -4\)

Let's substitute \((x, y) = (-4, 0)\) into both equations.

For the first equation: \[ 2(-4) + 0 = -8 \] \[ -8 + 0 = -8 \] This simplifies to: \[ -8 = -8 \quad \text{(True)} \]

For the second equation: \[ -4 - 0 = -4 \] This simplifies to: \[ -4 = -4 \quad \text{(True)} \]

Since the ordered pair \((-4, 0)\) satisfies both equations, it means:

  • The ordered pair \((-4, 0)\) is a solution to the first equation because it makes the first equation true.
  • The ordered pair \((-4, 0)\) is a solution to the second equation because it makes the second equation true.
  • The ordered pair \((-4, 0)\) is a solution to the system because it makes both equations true.

Therefore, the true statements are:

  1. The ordered pair (−4, 0) is a solution to the first equation because it makes the first equation true.
  2. The ordered pair (−4, 0) is a solution to the second equation because it makes the second equation true.
  3. The ordered pair (−4, 0) is a solution to the system because it makes both equations true.
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