The problem asks to graph the region determined by the following system of inequalities: $y \le 4x + 5$ $3y + 5x \le 12$ $x \ge -2$ $y \ge -5$

AlgebraLinear InequalitiesGraphingSystems of InequalitiesFeasible RegionLinear Programming
2025/3/13

1. Problem Description

The problem asks to graph the region determined by the following system of inequalities:
y4x+5y \le 4x + 5
3y+5x123y + 5x \le 12
x2x \ge -2
y5y \ge -5

2. Solution Steps

First inequality: y4x+5y \le 4x + 5.
This is a linear inequality. The boundary line is y=4x+5y = 4x + 5. The region is below this line.
Second inequality: 3y+5x123y + 5x \le 12.
Rearrange to get 3y5x+123y \le -5x + 12, so y53x+4y \le -\frac{5}{3}x + 4. The boundary line is y=53x+4y = -\frac{5}{3}x + 4. The region is below this line.
Third inequality: x2x \ge -2.
This represents the region to the right of the vertical line x=2x = -2.
Fourth inequality: y5y \ge -5.
This represents the region above the horizontal line y=5y = -5.
We need to find the region that satisfies all four inequalities. The region is bounded by the lines:
y=4x+5y = 4x + 5
y=53x+4y = -\frac{5}{3}x + 4
x=2x = -2
y=5y = -5
The vertices of the feasible region are the intersection points of these lines.
Intersection of x=2x = -2 and y=5y = -5: (2,5)(-2, -5)
Intersection of x=2x = -2 and y=4x+5y = 4x + 5: y=4(2)+5=8+5=3y = 4(-2) + 5 = -8 + 5 = -3. So, (2,3)(-2, -3).
Intersection of x=2x = -2 and y=53x+4y = -\frac{5}{3}x + 4: y=53(2)+4=103+123=223y = -\frac{5}{3}(-2) + 4 = \frac{10}{3} + \frac{12}{3} = \frac{22}{3}. So, (2,223)(-2, \frac{22}{3}).
Intersection of y=5y = -5 and y=4x+5y = 4x + 5: 5=4x+5-5 = 4x + 5, so 4x=104x = -10, and x=104=52x = -\frac{10}{4} = -\frac{5}{2}. So, (52,5)(-\frac{5}{2}, -5).
Intersection of y=5y = -5 and y=53x+4y = -\frac{5}{3}x + 4: 5=53x+4-5 = -\frac{5}{3}x + 4, so 53x=9-\frac{5}{3}x = -9, and x=275x = \frac{27}{5}. So, (275,5)(\frac{27}{5}, -5).
Intersection of y=4x+5y = 4x + 5 and y=53x+4y = -\frac{5}{3}x + 4: 4x+5=53x+44x + 5 = -\frac{5}{3}x + 4.
12x+15=5x+1212x + 15 = -5x + 12.
17x=317x = -3.
x=317x = -\frac{3}{17}.
y=4(317)+5=1217+8517=7317y = 4(-\frac{3}{17}) + 5 = -\frac{12}{17} + \frac{85}{17} = \frac{73}{17}. So, (317,7317)(-\frac{3}{17}, \frac{73}{17}).
The feasible region is the region bounded by the inequalities.

3. Final Answer

The region is bounded by the lines:
y4x+5y \le 4x + 5
3y+5x123y + 5x \le 12
x2x \ge -2
y5y \ge -5
The solution is the graph of the region defined by these inequalities.

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