/*! 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 52 In Exercises 27–62, graph the ... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

In Exercises 27–62, graph the solution set of each system of inequalities or indicate that the system has no solution. $$\left\\{\begin{array}{l} (x+1)^{2}+(y-1)^{2}<16 \\ (x+1)^{2}+(y-1)^{2} \geq 4 \end{array}\right.$$

Short Answer

Expert verified
The solution to the system of inequalities is the region between the two circles with center (-1,1) and radii 2 and 4.

Step by step solution

01

Graph the first inequality

Plotting the first inequality, \((x+1)^{2}+(y-1)^{2}<16\), gives a circle with center (-1,1) and radius equal to 4. Since the circle inequality is less than 16, we shade inside the circle.
02

Graph the second inequality

Plot the second inequality, \((x+1)^{2}+(y-1)^{2} \geq 4\). This will also give a circle with the same center (-1,1), but radius equal to 2. This inequality indicates that the area includes the boundary of the circle as well as outside of it.
03

Find the intersection of two inequalities

The solution to the system of inequalities is the area that satisfies both the above inequalities. This results in the region between these two circles.

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.

Inequality Graphing
Graphing an inequality involves plotting the region of a coordinate plane that satisfies the inequality's condition. Unlike equations, which typically have a line or curve as their representation, inequalities are represented by shaded areas. In the context of a system involving circular inequalities, such as \( (x+1)^{2}+(y-1)^{2}<16 \), visualization is key in understanding the solution set.

When graphing the inequality, remember to start with the equality part, which typically forms the boundary. In our example, the equality would be the circle itself, which is the boundary of the inequality. Next, determine whether to shade inside or outside the boundary. For inequalities with '<' or '<=', shade inside the curve. For '>', or '>=', shade outside. Added technicality comes with the 'strict' inequalities (without the equals part), where the boundary is a dashed line, meanwhile for 'non-strict' inequalities (with the equals part) it is a solid line, indicating that points on the line are also part of the solution set. Students often find it beneficial to practice plotting points around the circle to determine the correct area to shade.
System of Inequalities
When dealing with a system of inequalities, we're essentially looking for a common area that satisfies all inequalities in the system. To graph a system, each inequality is graphed separately, and then the overlapping region that satisfies all conditions is identified as the solution.

Here are some tips to ensure clarity when graphing a system:
  • Use different shading patterns or colors for each inequality to clearly distinguish them.
  • Always start with a clear sketch of each individual inequality.
  • Look for the intersection area where all conditions are met, which represents a common solution to all inequalities.
  • Check a point in the shaded region to ensure it satisfies all the inequalities in the system.
A system like \( (x+1)^{2}+(y-1)^{2} \geq 4 \) can be thought of as setting restrictions, or 'fencing in', where possible solutions can lie. Drawing such a system properly promotes understanding of the composite solution set.
Circle Inequalities
Circle inequalities are specific forms of inequalities where the solution set forms a circular area or a ring on a coordinate plane. The general form of a circle equation is \( (x-h)^{2}+(y-k)^{2}=r^{2} \), where \( (h, k) \) are the coordinates of the center, and \( r \) is the radius. When this equation becomes an inequality, such as \( (x+1)^{2}+(y-1)^{2}<16 \) or \( (x+1)^{2}+(y-1)^{2} \geq 4 \), the entire interior or exterior of the circle becomes relevant, depending on the inequality sign.

To efficiently graph circle inequalities, ensure you can:
  • Determine the center and radius from the inequality.
  • Decide if you will need to shade the inside or outside of the circle based on the direction of the inequality sign.
  • Remember that 'less than' translates to shading inside the circle, while 'greater than' means shading the area outside.
When a system has two circle inequalities with the same center, as seen in the given exercise, their combined solution set often appears as a ring or a 'donut-shaped' region, demonstrating the area sandwiched between the two boundaries.

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

What kinds of problems are solved using the linear programming method?

Involve supply and demand. Although Social Security is a problem, some projections indicate that there's a much bigger time bomb ticking in the federal budget, and that's Medicare. In \(2000,\) the cost of Social Security was \(5.48 \%\) of the gross domestic product, increasing by \(0.04 \%\) of the GDP per year. In \(2000,\) the cost of Medicare was \(1.84 \%\) of the gross domestic product, increasing by \(0.17 \%\) of the GDP per year. a. Write a function that models the cost of Social Security as a percentage of the GDP \(x\) years after 2000 . b. Write a function that models the cost of Medicare as a percentage of the GDP \(x\) years after 2000 . c. In which year will the cost of Medicare and Social Security be the same? For that year, what will be the cost of each program as a percentage of the GDP? Which program will have the greater cost after that year?

Describe a number of business ventures. For each exercise, a. Write the cost function, \(C\). b. Write the revenue function, \(R\). c. Determine the break-even point. Describe what this means. You invest in a new play. The cost includes an overhead of \(\$ 30,000,\) plus production costs of \(\$ 2500\) per performance. A sold-out performance brings in \(\$ 3125 .\) ( In solving this exercise, let \(x\) represent the number of sold-out performances.)

Determine whether each statement is true or false. If the statement is false, make the necessary change(s) to produce a true statement. A system of two equations in two variables whose graphs are two circles must have at least two real ordered-pair solutions

What is a half-plane?

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.