Select the correct answer.

Which point is a solution to the given system of inequalities?

[tex]\[
\begin{aligned}
x + 4y &\ \textgreater \ 12 \\
3y &\ \textgreater \ x + 6
\end{aligned}
\][/tex]

A. [tex]\((0, 3)\)[/tex]

B. [tex]\((-4, 6)\)[/tex]

C. [tex]\((5, 2)\)[/tex]

D. [tex]\((-2, 3)\)[/tex]



Answer :

To determine which point is a solution to the given system of inequalities:

[tex]\[ \begin{aligned} x + 4y & > 12 \\ 3y & > x + 6 \end{aligned} \][/tex]

we will check each point to see if it satisfies both inequalities.

1. Point [tex]\((0, 3)\)[/tex]:

First inequality: [tex]\(x + 4y > 12\)[/tex]
[tex]\[ 0 + 4 \cdot 3 > 12 \implies 12 > 12 \][/tex]
This is false because 12 is not greater than 12.

Second inequality: [tex]\(3y > x + 6\)[/tex]
[tex]\[ 3 \cdot 3 > 0 + 6 \implies 9 > 6 \][/tex]
This is true.

Since the first inequality is not satisfied by the point [tex]\((0, 3)\)[/tex], it is not a solution to the system.

2. Point [tex]\((-4, 6)\)[/tex]:

First inequality: [tex]\(x + 4y > 12\)[/tex]
[tex]\[ -4 + 4 \cdot 6 > 12 \implies -4 + 24 > 12 \implies 20 > 12 \][/tex]
This is true.

Second inequality: [tex]\(3y > x + 6\)[/tex]
[tex]\[ 3 \cdot 6 > -4 + 6 \implies 18 > 2 \][/tex]
This is also true.

Since both inequalities are satisfied by the point [tex]\((-4, 6)\)[/tex], it is a solution to the system.

3. Point [tex]\((5, 2)\)[/tex]:

First inequality: [tex]\(x + 4y > 12\)[/tex]
[tex]\[ 5 + 4 \cdot 2 > 12 \implies 5 + 8 > 12 \implies 13 > 12 \][/tex]
This is true.

Second inequality: [tex]\(3y > x + 6\)[/tex]
[tex]\[ 3 \cdot 2 > 5 + 6 \implies 6 > 11 \][/tex]
This is false.

Since the second inequality is not satisfied by the point [tex]\((5, 2)\)[/tex], it is not a solution to the system.

4. Point [tex]\((-2, 3)\)[/tex]:

First inequality: [tex]\(x + 4y > 12\)[/tex]
[tex]\[ -2 + 4 \cdot 3 > 12 \implies -2 + 12 > 12 \implies 10 > 12 \][/tex]
This is false.

Second inequality: [tex]\(3y > x + 6\)[/tex]
[tex]\[ 3 \cdot 3 > -2 + 6 \implies 9 > 4 \][/tex]
This is true.

Since the first inequality is not satisfied by the point [tex]\((-2, 3)\)[/tex], it is not a solution to the system.

Based on the evaluation of all points, the only point that satisfies both inequalities is:

[tex]\[ \boxed{(-4, 6)} \][/tex]