Chapter 7: Problem 53
In Exercises \(49-54\) , use a graphing utility to solve the system of equations. Find the solution(s) accurate to two decimal places. $$\left\\{\begin{array}{l}{x^{2}+y^{2}=169} \\ {x^{2}-8 y=104}\end{array}\right.$$
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Chapter 7: Problem 53
In Exercises \(49-54\) , use a graphing utility to solve the system of equations. Find the solution(s) accurate to two decimal places. $$\left\\{\begin{array}{l}{x^{2}+y^{2}=169} \\ {x^{2}-8 y=104}\end{array}\right.$$
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In Exercises 37-40, determine whether each ordered pair is a solution of the system of linear inequalities. \( \left\\{\begin{array}{l} 3x + y > 1\\\ -y - \dfrac{1}{2}x^2 \le -4\\\ -15x + 4y > 0\end{array}\right. \) (a) \( (0, 10) \) (b) \( (0, -1) \) (c) \( (2, 9) \) (d) \( (-1, 6) \)
In Exercises 55-60, use a graphing utility to graph the solution set of the system of inequalities. \( \left\\{\begin{array}{l} x^2 y \ge 1\\\ 0 < x \le 4\\\ \hspace{1cm} y \le 4\end{array}\right. \)
A merchant plans to sell two models of MP3 players at prices of \(\$ 225\) and \(\$ 250\) . The \(\$ 225\) model yields a profit of \(\$ 30\) per unit and the \(\$ 250\) model yields a profit of \(\$ 31\) per unit. The merchant estimates that the total monthly demand will not exceed 275 units. The merchant does not want to invest more than \(\$ 63,000\) in inventory for these products. What is the optimal inventory level for each model? What is the optimal profit?
In Exercises 41-54, sketch the graph and label the vertices of the solution set of the system of inequalities. \( \left\\{\begin{array}{l} x - y^2 > 0\\\ x - y > 2\end{array}\right. \)
In Exercises 7-20, sketch the graph of the inequality. \( y > 4x - 3 \)
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