3 4 linear programming word problems
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3 – 4 Linear Programming Word Problems. Linear Programming Steps. Define the variables. Write a system of inequalities. Graph the system of inequalities. Find the coordinates of the vertices of the feasible region.

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3 – 4 Linear Programming Word Problems

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3 4 linear programming word problems

3 – 4Linear Programming Word Problems


Linear programming steps

Linear Programming Steps

  • Define the variables.

  • Write a system of inequalities.

  • Graph the system of inequalities.

  • Find the coordinates of the vertices of the feasible region.

    Sometimes you may have to solve a system of equations to identify the exact point at which two lines intersect.

  • Write the function to be maximized.

  • Substitute the coordinates of the vertices into the function.

  • Select the greatest or least amount. Answer the problem.


3 4 linear programming word problems

Ex 5

A landscaping company has crews who mow lawns and prune shrubbery. The company schedules 1 hour for mowing jobs and 3 hours for pruning jobs. Each crew is scheduled for no more than 2 pruning jobs per day. Each crew’s schedule is set up for a maximum of 9 hours per day. On the average, the charge for mowing a lawn is $40 and the charge for pruning shrubbery is $120. Find a combination of mowing lawns and pruning shrubs that will maximize the income the company receives per day from one of its crews.

  • Define the variables.

Example 4-3a


3 4 linear programming word problems

  • Write a system of inequalities.

Since the number of jobs cannot be negative, m and p must be nonnegative numbers.

Mowing jobs take 1 hour. Pruning jobs take 3 hours. There are 9 hours to do the jobs.

There are no more than 2 pruning jobs a day.

Example 4-3a


3 4 linear programming word problems

  • Graph the system of inequalities.

Example 4-3a


3 4 linear programming word problems

  • Find the coordinates of the vertices of thefeasible region.

From the graph, the vertices are at

  • Write the function to be maximized.

The function that describes the income is

We want to find the maximum value for this function.

Example 4-3a


3 4 linear programming word problems

  • Substitute the coordinates of the vertices intothe function.

  • Select the greatest amount and answer the question.

Example 4-3a


3 4 linear programming word problems

Ex 6

A landscaping company has crews who rake leaves and mulch. The company schedules 2 hours for mulching jobs and 4 hours for raking jobs. Each crew is scheduled for no more than 2 raking jobs per day. Each crew’s schedule is set up for a maximum of 8 hours per day. On the average, the charge for raking a lawn is $50 and the charge for mulching is $30. Find a combination of raking leaves and mulching that will maximize the income the company receives per day from one of its crews.

Example 4-3b


3 4 linear programming word problems

Example 4-3b


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