Chapter 8: Problem 21
What is a verbal model of a real-life problem?
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These are the key concepts you need to understand to accurately answer the question.
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Chapter 8: Problem 21
What is a verbal model of a real-life problem?
These are the key concepts you need to understand to accurately answer the question.
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In Exercises 17-22, sketch the graph of the system of linear inequalities, and label the vertices. $$ \left\\{\begin{aligned} 2 x+y & \geq 2 \\ x & \leq 2 \\ y & \leq 1 \end{aligned}\right. $$
A total of \(\$ 12,000\) is invested in two bonds that pay \(10.5 \%\) and \(12 \%\) simple interest. (There is more risk in the \(12 \%\) bond.) The combined annual interest is \(\$ 1380\). How much is invested in each bond? (a) Write a verbal model for this problem. (b) Assign labels to the verbal model. (c) Use the labels to write a linear system. (d) Solve the system and answer the question.
Two types of tickets are to be sold for a concert. One type costs \(\$ 15\) per ticket and the other type costs \(\$ 25\) per ticket. The promoter of the concert must sell at least 15,000 tickets, including at least 8000 of the \(\$ 15\) tickets and at least 4000 of the \(\$ 25\) tickets. Moreover, the gross receipts must total at least \(\$ 275,000\) in order for the concert to be held. Write a system of linear inequalities that describes the different numbers of tickets that can be sold.
Can the solution of a system of linear inequalities be a single point? Explain.
Explain the meaning of the term half-plane. Give an example of an inequality whose graph is a half-plane.
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