Experience the power of community-driven knowledge on IDNLearn.com. Discover detailed and accurate answers to your questions from our knowledgeable and dedicated community members.

Which point is a solution to this system of inequalities?

[tex]\[
\begin{array}{l}
y \leq \frac{1}{2} x - 3 \\
y + 2x \ \textgreater \ 6
\end{array}
\][/tex]

A. [tex]\((7, -8)\)[/tex]
B. [tex]\((2, -3)\)[/tex]
C. [tex]\((5, -2)\)[/tex]
D. [tex]\((4, 1)\)[/tex]


Sagot :

To determine which point satisfies the given system of inequalities:

[tex]\[ \begin{cases} y \leq \frac{1}{2} x - 3 \\ y + 2x > 6 \end{cases} \][/tex]

we need to check each of the given points against both inequalities. Let's analyze each point in turn:

1. Point (7, -8)

Check the first inequality:
[tex]\[ -8 \leq \frac{1}{2} \cdot 7 - 3 \][/tex]
[tex]\[ -8 \leq 3.5 - 3 \][/tex]
[tex]\[ -8 \leq 0.5 \quad \text{(True)} \][/tex]

Check the second inequality:
[tex]\[ -8 + 2 \cdot 7 > 6 \][/tex]
[tex]\[ -8 + 14 > 6 \][/tex]
[tex]\[ 6 > 6 \quad \text{(False)} \][/tex]

Since both inequalities must be satisfied and the second one is false, point (7, -8) is not a solution.

2. Point (2, -3)

Check the first inequality:
[tex]\[ -3 \leq \frac{1}{2} \cdot 2 - 3 \][/tex]
[tex]\[ -3 \leq 1 - 3 \][/tex]
[tex]\[ -3 \leq -2 \quad \text{(True)} \][/tex]

Check the second inequality:
[tex]\[ -3 + 2 \cdot 2 > 6 \][/tex]
[tex]\[ -3 + 4 > 6 \][/tex]
[tex]\[ 1 > 6 \quad \text{(False)} \][/tex]

Since both inequalities must be satisfied and the second one is false, point (2, -3) is not a solution.

3. Point (5, -2)

Check the first inequality:
[tex]\[ -2 \leq \frac{1}{2} \cdot 5 - 3 \][/tex]
[tex]\[ -2 \leq 2.5 - 3 \][/tex]
[tex]\[ -2 \leq -0.5 \quad \text{(True)} \][/tex]

Check the second inequality:
[tex]\[ -2 + 2 \cdot 5 > 6 \][/tex]
[tex]\[ -2 + 10 > 6 \][/tex]
[tex]\[ 8 > 6 \quad \text{(True)} \][/tex]

Since both inequalities are satisfied, point (5, -2) is a solution to the system.

4. Point (4, 1)

Check the first inequality:
[tex]\[ 1 \leq \frac{1}{2} \cdot 4 - 3 \][/tex]
[tex]\[ 1 \leq 2 - 3 \][/tex]
[tex]\[ 1 \leq -1 \quad \text{(False)} \][/tex]

Check the second inequality:
[tex]\[ 1 + 2 \cdot 4 > 6 \][/tex]
[tex]\[ 1 + 8 > 6 \][/tex]
[tex]\[ 9 > 6 \quad \text{(True)} \][/tex]

Since both inequalities must be satisfied and the first one is false, point (4, 1) is not a solution.

After checking all the points, we find that the only point that satisfies both inequalities is:

[tex]\[ \boxed{3} \][/tex]
We appreciate your presence here. Keep sharing knowledge and helping others find the answers they need. This community is the perfect place to learn together. Find the answers you need at IDNLearn.com. Thanks for stopping by, and come back soon for more valuable insights.