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Chapter 5: Problem 7
Write an inequality to represent the given statement. The value of \(x\) is more than 60 but not more than 80 .
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Use a graphing utility to approximate the solution(s) to the system of equations. Round the coordinates to 3 decimal places. $$ \begin{array}{l} x^{2}+y^{2}=40 \\ y=-x^{2}+8.5 \end{array} $$
Solve the system using any method. $$ \begin{array}{l} 5(2 x+y)=y-x-8 \\ x-\frac{3}{2} y=\frac{5}{2} \end{array} $$
Solve the system of equations by using the addition method. (See Examples \(3-4)\) $$ \begin{array}{l} -3(x-y)=y-14 \\ 2 x+2=7 y \end{array} $$
A system of equations that has no solution is called an _____ system.
The average of an electrician's hourly wage and a plumber's hourly wage is \(\$ 33 .\) One day a contractor hires the electrician for \(8 \mathrm{hr}\) of work and the plumber for \(5 \mathrm{hr}\) of work and pays a total of \(\$ 438\) in wages. Find the hourly wage for the electrician and for the plumber.
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