College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 5, Systems of Equations and Inequalities - Chapter 5 Review - Exercises - Page 480: 42

Answer

$x^2+y^2\geq8$.

Work Step by Step

According to the given graph and the equation, our inequality is: $x^2+y^2\geq8$. This includes the shaded area and the function itself (because we have an equals sign). Notice that we used a greater-than sign to shade the graph outside the circle. We confirm the inequality by plugging in $(0,0)$, which gives us: $0^2+0^2\ge8$ This is a false statement, as expected because the origin is not in the shaded region. Thus, the inequality works.
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