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Which ordered pair makes both inequalities true?

[tex]\[
\begin{array}{l}
y \ \textgreater \ -3x + 3 \\
y \geq 2x - 2
\end{array}
\][/tex]

A. \((1,0)\)

B. \((-1,1)\)

C. [tex]\((2,2)\)[/tex]


Sagot :

To determine which ordered pair makes both inequalities true, we need to check each pair against the given inequalities:

[tex]\[ \begin{cases} y > -3x + 3 \\ y \geq 2x - 2 \end{cases} \][/tex]

Let's test each pair one by one:

1. Pair \((1, 0)\):
- First inequality: \( y > -3x + 3 \)
[tex]\[ 0 > -3(1) + 3 \rightarrow 0 > -3 + 3 \rightarrow 0 > 0 \][/tex]
This is false.

- Second inequality: \( y \geq 2x - 2 \)
[tex]\[ 0 \geq 2(1) - 2 \rightarrow 0 \geq 2 - 2 \rightarrow 0 \geq 0 \][/tex]
This is true.

Since the first inequality is false, \((1, 0)\) does not satisfy both inequalities.

2. Pair \((-1, 1)\):
- First inequality: \( y > -3x + 3 \)
[tex]\[ 1 > -3(-1) + 3 \rightarrow 1 > 3 + 3 \rightarrow 1 > 6 \][/tex]
This is false.

- Second inequality: \( y \geq 2x - 2 \)
[tex]\[ 1 \geq 2(-1) - 2 \rightarrow 1 \geq -2 - 2 \rightarrow 1 \geq -4 \][/tex]
This is true.

Since the first inequality is false, \((-1, 1)\) does not satisfy both inequalities.

3. Pair \((2, 2)\):
- First inequality: \( y > -3x + 3 \)
[tex]\[ 2 > -3(2) + 3 \rightarrow 2 > -6 + 3 \rightarrow 2 > -3 \][/tex]
This is true.

- Second inequality: \( y \geq 2x - 2 \)
[tex]\[ 2 \geq 2(2) - 2 \rightarrow 2 \geq 4 - 2 \rightarrow 2 \geq 2 \][/tex]
This is true.

Since both inequalities are true, \((2, 2)\) satisfies both.

Thus, the ordered pair [tex]\((2, 2)\)[/tex] is the one that makes both inequalities true.