Which of the following points is in the solution for the system of inequalities: y ≤ -3x + 4 and y ≥ 2x - 3?
Understand the Problem
The question is asking to determine which of the provided points satisfies the given system of inequalities. To solve this, we will evaluate each point against the inequalities to see if they hold true.
Answer
The solution is \( (0, 0) \).
Answer for screen readers
The solution to the system of inequalities is the point ( (0, 0) ).
Steps to Solve
-
Understand the inequalities
We have the inequalities:
$$ y \leq -3x + 4 $$
$$ y \geq 2x - 3 $$
We need to find which of the given points satisfies both inequalities. -
Check Point A: (0, 0)
Substitute ( x = 0 ) and ( y = 0 ) into both inequalities.
For the first inequality:
$$ 0 \leq -3(0) + 4 \implies 0 \leq 4 \quad \text{(True)} $$
For the second inequality:
$$ 0 \geq 2(0) - 3 \implies 0 \geq -3 \quad \text{(True)} $$ -
Check Point B: (2, 2)
Substitute ( x = 2 ) and ( y = 2 ) into both inequalities.
For the first inequality:
$$ 2 \leq -3(2) + 4 \implies 2 \leq -6 + 4 \implies 2 \leq -2 \quad \text{(False)} $$
For the second inequality:
$$ 2 \geq 2(2) - 3 \implies 2 \geq 4 - 3 \implies 2 \geq 1 \quad \text{(True)} $$ -
Check Point C: (2, 0)
Substitute ( x = 2 ) and ( y = 0 ) into both inequalities.
For the first inequality:
$$ 0 \leq -3(2) + 4 \implies 0 \leq -6 + 4 \implies 0 \leq -2 \quad \text{(False)} $$
For the second inequality:
$$ 0 \geq 2(2) - 3 \implies 0 \geq 4 - 3 \implies 0 \geq 1 \quad \text{(False)} $$ -
Check Point D: (2, -4)
Substitute ( x = 2 ) and ( y = -4 ) into both inequalities.
For the first inequality:
$$ -4 \leq -3(2) + 4 \implies -4 \leq -6 + 4 \implies -4 \leq -2 \quad \text{(False)} $$
For the second inequality:
$$ -4 \geq 2(2) - 3 \implies -4 \geq 4 - 3 \implies -4 \geq 1 \quad \text{(False)} $$ -
Conclusion
The only point that satisfies both inequalities is Point A: ( (0, 0) ).
The solution to the system of inequalities is the point ( (0, 0) ).
More Information
The point ( (0, 0) ) is the only point that satisfies both inequalities, meaning it lies within the feasible region defined by the system.
Tips
- Misinterpreting the direction of inequalities (e.g., mixing up ( \geq ) with ( \leq )).
- Failing to check both inequalities for each point.
- Mistakenly assuming a point satisfies one inequality means it satisfies the system.
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