Check whether (-1, 5) is a solution of the system of equations.

y = -2x + 3
y = x - 4
I said no because one comes up a positive 5 and the other a negative five. Am I correct

correct,

subbing in x=-1 has to give you +5 for both equations.

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To check whether (-1, 5) is a solution of the system of equations, you need to substitute the values of x and y from the point (-1, 5) into both equations and see if both sides are equal.

Equation 1: y = -2x + 3
Substituting x = -1 and y = 5:
5 = -2(-1) + 3
5 = 2 + 3
5 = 5

Equation 2: y = x - 4
Substituting x = -1 and y = 5:
5 = (-1) - 4
5 = -1 - 4
5 = -5

As you correctly mentioned, the values do not match in Equation 2. Therefore, (-1, 5) is not a solution to the system of equations.