GG.1 Is (x, y) a solution to the system of equations?

N46
Is (

4,4) a solution to this system of equations?
y=

1
4
x+3
y=x+9

1 answer

To determine whether the point \((-4, 4)\) is a solution to the given system of equations, we need to substitute \(x = -4\) and \(y = 4\) into each equation and check if both equations hold true.

The system of equations is:

  1. \(y = -\frac{1}{4}x + 3\)
  2. \(y = x + 9\)

Check the first equation:

Substituting \(x = -4\) into the first equation: \[ y = -\frac{1}{4}(-4) + 3 \] \[ y = 1 + 3 \] \[ y = 4 \]

This matches the \(y\)-value provided, so \((-4, 4)\) satisfies the first equation.

Check the second equation:

Substituting \(x = -4\) into the second equation: \[ y = -4 + 9 \] \[ y = 5 \]

This does not match the \(y\)-value provided (which is \(4\)). Thus, \((-4, 4)\) does not satisfy the second equation.

Conclusion: The point \((-4, 4)\) is not a solution to the system of equations because it does not satisfy both equations.