Subjects algebra

Inequality System A65B75

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1. The problem involves solving and understanding the system of inequalities: $$y < -\frac{3}{2}x + 5$$ $$3x + 4y < 20$$ $$4y < -3x + 20$$ $$x - 2y < 0$$ $$-2y < -\frac{x}{2}$$ $$y < -\frac{1}{2}x + 0$$ 2. First, note that the second inequality $3x + 4y < 20$ is equivalent to $4y < -3x + 20$ by subtracting $3x$ from both sides. 3. The fourth inequality $x - 2y < 0$ can be rewritten by isolating $y$: $$x - 2y < 0$$ $$-2y < -x$$ $$\cancel{-2}y > \cancel{-} \frac{x}{\cancel{2}}$$ $$y > \frac{x}{2}$$ Note the inequality sign flips when dividing by a negative number. 4. The fifth inequality $-2y < -\frac{x}{2}$ can be rewritten: $$-2y < -\frac{x}{2}$$ $$\cancel{-2}y > \cancel{-} \frac{x}{2 \times 2}$$ $$y > \frac{x}{4}$$ Again, the inequality flips when dividing by negative. 5. The last inequality is $y < -\frac{1}{2}x + 0$, which is already solved for $y$. 6. Summarizing the inequalities in $y$: - $y < -\frac{3}{2}x + 5$ - $y < -\frac{3}{4}x + 5$ (from $4y < -3x + 20$ dividing both sides by 4) - $y > \frac{x}{2}$ - $y > \frac{x}{4}$ - $y < -\frac{1}{2}x$ 7. These inequalities describe regions bounded by lines with slopes and intercepts as above. 8. The graphs show shading for $y < -\frac{3}{2}x + 5$ and vertical bars at integer $x$ values. Final answer: The system of inequalities describes the region where $y$ is less than the lines $-\frac{3}{2}x + 5$, $-\frac{3}{4}x + 5$, and $-\frac{1}{2}x$, and greater than the lines $\frac{x}{2}$ and $\frac{x}{4}$. The inequalities involving $y$ define a feasible region bounded by these lines.