/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 16 Sketch the region that correspon... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

Sketch the region that corresponds to the given inequalities, say whether the region is bounded or unbounded, and find the coordinates of all corner points (if any). $$ \begin{aligned} 3 x+2 y & \leq 6 \\ 3 x-2 y & \geq 6 \\ -y & \geq 2 \end{aligned} $$

Short Answer

Expert verified
The solution to the given inequalities is an unbounded region in the coordinate plane. As the region is unbounded, there are no corner points to find.

Step by step solution

01

Plot each inequality on a coordinate plane

We'll start by finding the equations of the boundary lines for each inequality: - For the first inequality, the equation is \(3x + 2y = 6\) - For the second inequality, the equation is \(3x - 2y = 6\) - For the third inequality, the equation is \(-y = 2\) Now let's plot these lines on a coordinate plane. You can do this by finding the x and y intercepts: For the first line: - set x = 0 , => y = 3 - set y = 0 , => x = 2 For the second line: - set x = 0 , => y = -3 - set y = 0 , => x = 2 For the third line: - y = -2 (horizontal line) Now plot these lines on a coordinate plane
02

Identify the inequality region

Now, we have to identify the region that satisfies all the inequalities. Test a point in each region: - For the first inequality, test point (0,0) => 3(0)+2(0) ≤ 6 => 0 ≤ 6 (True) - For the second inequality, test point (0,0) => 3(0)-2(0) ≥ 6 => 0 ≥ 6 (False) - For the third inequality, test point (0,0) => -0 ≥ 2 => 0 ≥ 2 (False) Based on these tests, we can now shade the region that satisfies all the inequalities, keeping in mind that our second and third inequalities were false for the origin.
03

Check if the region is bounded or unbounded

Look at your graph. If the region enclosed by all the lines is a finite area, then the region is bounded. If the region is not enclosed (extending infinitely) then the region is unbounded. In our case, we can see that the region is extending infinitely. Therefore, the region is unbounded.
04

Find corner points (if any)

Since our region is unbounded, there are no corner points to be found. We've now sketched the region that corresponds to the given inequalities, determined that it is an unbounded region, and found the coordinates of all corner points (none, in this case).

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91Ó°ÊÓ!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

System of Inequalities
When solving a system of inequalities, you are working with two or more inequalities at the same time. The solution to the system is the set of all points that satisfy all of the inequalities simultaneously. To find this solution set, you'll often translate the inequalities into a visual format using a graph.

It's important to plot each inequality one by one, starting by transforming the inequality into an equation to find boundary lines. These lines will divide the coordinate plane into regions. However, unlike equations, inequalities do not only represent a line but also one side of that line - often indicated by shading. After plotting, you'll need to identify the region where the shading overlaps, which signifies where all the inequalities in your system are true. This overlapping region is the solution to the system of inequalities.
Graphing Linear Inequalities
In the context of graphing linear inequalities, the main goal is to translate the algebraic expressions into visual representations. Firstly, handle the inequality as if it's an equation to get the boundary line. This could be drawn as a solid line if the inequality includes equality (≤ or ≥), indicating that points on the line are included in the solution, or a dashed line if not (< or >).

The next step involves determining which side of the line the inequality refers to. You can do this by picking a test point, usually the origin (0,0), unless the boundary line passes through it. Plug this point into the inequality; if it satisfies the inequality, then that side of the boundary line is shaded – otherwise, you shade the opposite side. By doing this for each inequality, you define possible solution sets. The final solution region is where these sets intersect.
Bounded and Unbounded Regions
Bounded and unbounded regions are concepts that refer to the nature of the solution set obtained from graphing inequalities. A region is bounded if it's enclosed by the boundary lines and creates a finite area on the graph. In other words, you can draw a circle around the entire region without including points that aren't part of the solution.

On the other hand, an unbounded region extends indefinitely in one or more directions. This means that no matter how far you extend the boundary lines, the region keeps going. In such cases, you cannot enclose the solution set inside a finite circle because it stretches to infinity in at least one direction. When determining whether a region is bounded or unbounded, it's important to consider the directions that the inequalities open to and whether the intersecting inequalities wrap around a finite area.
Coordinate Geometry
In the study of coordinate geometry, we analyze geometric figures using a coordinate system. This approach combines algebra and geometry, making it possible to solve geometric problems through algebraic equations.

A fundamental aspect of coordinate geometry is the graphing of lines and curves to understand the relationships between algebraic equations and their geometric representations. For instance, linear equations correspond to straight lines in coordinate geometry. The coordinates of points, the slope of lines, and the formulation of equations representing geometric shapes are all part of this subject domain. Intersections between different geometrical elements, which can be identified by solving sets of equations simultaneously, are key points of interest – such as the corner points of a system of inequalities.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Can the value of the objective function remain unchanged in passing from one tableau to the next? Explain.

$$ \begin{aligned} \text { Minimize } & c=s+t \\ \text { subject to } & s+2 t \geq 6 \\ & 2 s+t \geq 6 \\ & s \geq 0, t \geq 0 . \end{aligned} $$

\(\nabla\) \mathrm{\\{} T r a n s p o r t a t i o n ~ S c h e d u l i n g ~ W e ~ r e t u r n ~ t o ~ y o u r ~ e x p l o i t s ~ c o - ~ ordinating distribution for the Tubular Ride Boogie Board Company. \({ }^{36}\) You will recall that the company has manufacturing plants in Tucson, Arizona and Toronto, Ontario, and you have been given the job of coordinating distribution of their latest model, the Gladiator, to their outlets in Honolulu and Venice Beach. The Tucson plant can manufacture up to 620 boards per week, while the Toronto plant, beset by labor disputes, can produce no more than 410 Gladiator boards per week. The outlet in Honolulu orders 500 Gladiator boards per week, while Venice Beach orders 530 boards per week. Transportation costs are as follows: Tucson to Honolulu: \(\$ 10 /\) board; Tucson to Venice Beach: \(\$ 5 /\) board; Toronto to Honolulu: \(\$ 20 /\) board; Toronto to Venice Beach: \(\$ 10 /\) board. Your manager has said that you are to be sure to fill all orders and ship the boogie boards at a minimum total transportation cost. How will you do it?

In February 2002, each episode of "Boston Public" was typically seen in \(7.0\) million homes, while each episode of "NYPD Blue" was seen in \(7.8\) million homes. \({ }^{16}\) Your marketing services firm has been hired to promote Gauss Jordan Sneakers by buying at least 30 commercial spots during episodes of "Boston Public" and "NYPD Blue." The cable company running "Boston Public" has quoted a price of \(\$ 2,000\) per spot, while the cable company showing "NYPD Blue" has quoted a price of \(\$ 3,000\) per spot. Gauss Jordan Sneakers' advertising budget for TV commercials is \(\$ 70,000\), and it would like at least \(75 \%\) of the total number of spots to appear on "Boston Public." How many spots should you purchase on each show to reach the most homes?

Agriculture \(^{30}\) Your farm encompasses 900 acres, and you are planning to grow soybeans, corn, and wheat in the coming planting season. Fertilizer costs per acre are: \(\$ 5\) for soybeans, \(\$ 2\) for corn, and \(\$ 1\) for wheat. You estimate that each acre of soybeans will require an average of 5 hours of labor per week, while tending to corn and wheat will each require an average of 2 hours per week. Based on past yields and current market prices, you estimate a profit of \(\$ 3,000\) for each acre of soybeans, \(\$ 2,000\) for each acre of corn, and \(\$ 1,000\) for each acre of wheat. You can afford to spend no more than \(\$ 3,000\) on fertilizer, but your labor union contract stipulates at least 2,000 hours per week of labor. How many acres of each crop should you plant to maximize total profits? In this event, will you be using more than 2,000 hours of labor?

See all solutions

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.