Linear Inequalities Exercise 3
Question:
Solve the following system of inequalities graphically 2x+y≥6,3x+4y≤12
Answer:
Step 1: Plot the two lines on the graph.
Step 2: Shade the region where the two lines intersect.
Step 3: The solution to the system of inequalities is the shaded region.
Question:
Solve the given inequalities graphically: x+y≤ 6,x+y ≥ 4
Answer:
Step 1: Draw the x-axis and y-axis on the graph paper.
Step 2: Plot the given inequalities on the graph paper.
Step 3: Shade the region satisfying the inequality, i.e., the region where both the inequalities are true.
Step 4: The solution of the given system of inequality is the shaded region.
Question:
Solve the following system of inequalities graphically 3x+4y≤60,x+3y≤30,x≥0,y≥0
Answer:
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Graph the lines 3x+4y=60, x+3y=30, x=0, and y=0 on a coordinate plane.
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Shade the area of the coordinate plane that satisfies all of the inequalities.
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The solution set is the area of the coordinate plane that is shaded.
Question:
Solve the system of inequalities graphically 3x+2y≤150,x+4y≤80,x≤15,y≥0,x≥0
Answer:
Step 1: Plot the lines 3x+2y=150, x+4y=80, x=15, y=0, and x=0.
Step 2: Shade the region that satisfies all the conditions.
Step 3: The solution is the shaded region.
Question:
Solve the given inequalities graphically: x+2y≤10,x+y≥1,x−y≤0,x≥0,y≥0
Answer:
Step 1: Draw the x-axis and y-axis on the graph.
Step 2: Plot the line x+2y=10 and find the region where x+2y≤10.
Step 3: Plot the line x+y=1 and find the region where x+y≥1.
Step 4: Plot the line x−y=0 and find the region where x−y≤0.
Step 5: Plot the line x=0 and find the region where x≥0.
Step 6: Plot the line y=0 and find the region where y≥0.
Step 7: Shade the region where all the inequalities are satisfied. This is the solution of the given inequalities.
Question:
Solve the following inequations graphically: 2x−y>1,x−2y<−1
Answer:
Step 1: Plot the equations on the graph.
Step 2: Draw a line for each equation.
Step 3: Shade the region that satisfies both equations.
Step 4: The solution set is the shaded region.
Question:
Solve the following system of inequalities graphically x≥3,y≥2
Answer:
Step 1: Draw the coordinate plane.
Step 2: Draw the line x=3 and y=2 on the coordinate plane.
Step 3: Shade the area of the coordinate plane that satisfies both inequalities. This area is the solution.
Question:
Solve: x+y≥4, 2x−y>0
Answer:
Step 1: Subtract y from both sides of the first equation: x ≥ 4 - y
Step 2: Add y to both sides of the second equation: 2x > y
Step 3: Subtract x from both sides of the second equation: y > 2x - x
Step 4: Simplify the second equation: y > x
Step 5: Substitute 4 - y for x in the second equation: y > 4 - y
Step 6: Add y to both sides of the second equation: 2y > 4
Step 7: Divide both sides of the second equation by 2: y > 2
Question:
Solve the following system of inequalities graphically : 4x+3y≤60,y≥2x,x≥3,x,x≥0
Answer:
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Graph the line 4x+3y=60
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Graph the line y=2x
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Graph the line x=3
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Shade the region where all inequalities are satisfied
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The solution set is the region where all inequalities are satisfied and x≥0.
Question:
Solve the system of inequalities graphically: x−2y≤3,3x+4y≥12,x≥0,y≥1
Answer:
Step 1: Graph the lines x−2y=3, 3x+4y=12, x=0, and y=1.
Step 2: Determine the points of intersection of the lines.
Step 3: Shade the region that satisfies all of the inequalities.
Step 4: The solution is the shaded region.
Question:
Solve the following system of inequalities graphically 2x+y≥8,x+2y≥10
Answer:
Step 1: Plot the lines for the two equations on the same graph:
2x + y = 8 x + 2y = 10
Step 2: Find the points of intersection of the two lines.
The points of intersection are (4, 4) and (6, 2).
Step 3: Shade the region that satisfies both equations.
The shaded region represents the solution to the system of inequalities.
Question:
Solve the given inequalities graphically: 3x+2y ≤ 12,x ≥ 1,y ≥2
Answer:
Step 1: Draw the coordinate plane.
Step 2: Plot the points (1,2) and (0,6).
Step 3: Draw the line through the two points.
Step 4: Shade the region above the line.
Step 5: The solution set is the shaded region.
Question:
Solve the given inequalities graphically: x+y≤9,y>x,x≥0
Answer:
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Plot the line x + y = 9.
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Shade the area below the line and to the right of the x-axis.
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Shade the area below the line and to the left of the y-axis.
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The solution is the area not shaded, which is the area above the line and to the right of both axes.
Question:
Solve the system of inequalities graphically: 5x+4y≤ 20,x≥1,y ≥2
Answer:
Step 1: Graph the inequalities 5x+4y≤ 20 and x≥1 on the same coordinate plane.
Step 2: Shade the region that satisfies both inequalities.
Step 3: Graph the inequality y ≥2 and find the points of intersection with the other two inequalities.
Step 4: Shade the region that satisfies all three inequalities.
Question:
Solve the following system of inequalities graphically 2x+y≥4,x+y≤3,2x−3y≤6
Answer:
Step 1: Graph the lines 2x + y = 4, x + y = 3, and 2x - 3y = 6 on the coordinate plane.
Step 2: Determine the points of intersection of the lines.
Step 3: Shade the region that satisfies all three inequalities. This is the solution set.