Math Problem Statement

Which point would not be a solution to the system of linear inequalities shown below? y ≥ (3/2)x + 4 and y < (1/2)x + 5

Solution

To determine which point would not be a solution to the given system of inequalities, let’s examine each inequality with the provided points:

Inequalities:

  1. y32x+4y \geq \frac{3}{2}x + 4
  2. y<12x+5y < \frac{1}{2}x + 5

For each point, we will substitute the xx and yy values and check if they satisfy both inequalities.


Testing the Points:

  1. Point (8,4)(-8, -4):

    • First inequality: 432(8)+4412+448-4 \geq \frac{3}{2}(-8) + 4 \Rightarrow -4 \geq -12 + 4 \Rightarrow -4 \geq -8 (True)
    • Second inequality: 4<12(8)+54<4+54<1-4 < \frac{1}{2}(-8) + 5 \Rightarrow -4 < -4 + 5 \Rightarrow -4 < 1 (True)

    This point satisfies both inequalities.

  2. Point (8,2)(-8, -2):

    • First inequality: 232(8)+4212+428-2 \geq \frac{3}{2}(-8) + 4 \Rightarrow -2 \geq -12 + 4 \Rightarrow -2 \geq -8 (True)
    • Second inequality: 2<12(8)+52<4+52<1-2 < \frac{1}{2}(-8) + 5 \Rightarrow -2 < -4 + 5 \Rightarrow -2 < 1 (True)

    This point satisfies both inequalities.

  3. Point (12,6)(-12, -6):

    • First inequality: 632(12)+4618+4614-6 \geq \frac{3}{2}(-12) + 4 \Rightarrow -6 \geq -18 + 4 \Rightarrow -6 \geq -14 (True)
    • Second inequality: 6<12(12)+56<6+56<1-6 < \frac{1}{2}(-12) + 5 \Rightarrow -6 < -6 + 5 \Rightarrow -6 < -1 (True)

    This point satisfies both inequalities.

  4. Point (8,0)(8, 0):

    • First inequality: 032(8)+4012+40160 \geq \frac{3}{2}(8) + 4 \Rightarrow 0 \geq 12 + 4 \Rightarrow 0 \geq 16 (False)

    Since this point does not satisfy the first inequality, it does not satisfy the system.


Conclusion:

The point (8,0)(8, 0) would not be a solution to the system of inequalities.

Would you like further details on this solution, or do you have any additional questions?


Related Questions:

  1. How do you determine if a point is a solution to a system of inequalities?
  2. What are common strategies for solving systems of linear inequalities graphically?
  3. How do you graph inequalities with different inequality symbols (e.g., \geq vs. >>)?
  4. What applications do systems of inequalities have in real-life situations?
  5. How can we interpret the intersection region of inequalities?

Tip:

When testing points in a system of inequalities, always substitute each point into each inequality and verify if the point satisfies all inequalities in the system.

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Math Problem Analysis

Mathematical Concepts

Algebra
Systems of Inequalities
Graphing Inequalities

Formulas

y ≥ (3/2)x + 4
y < (1/2)x + 5

Theorems

Solution region of system of inequalities

Suitable Grade Level

Grades 9-10