Chapter 9: Problem 38
Find the union of the sets. $$\\{e, m, p, t, y\\} \cup \varnothing$$
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Chapter 9: Problem 38
Find the union of the sets. $$\\{e, m, p, t, y\\} \cup \varnothing$$
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Sketch the graph of the solution set for the following system of inequalities: $$\left\\{\begin{array}{l}y \geq n x+b(n<0, b>0) \\\y \leq m x+b(m>0, b>0) \end{array}\right.$$
The graphs of solution sets of systems of inequalities involve finding the intersection of the solution sets of nwo or more incqualities. By contrast, in Exercises \(53-54\) you will be graphing the union of the solution sets of two inequalities. Graph the union of \(x-y \geq-1\) and \(5 x-2 y \leq 10\)
On the first four exams, your grades are \(82,75,80,\) and 90. There is still a final exam, and it counts as two grades. You are hoping to earn a \(\mathrm{B}\) in the course: This will occur if the average of your six exam grades is greater than or equal to 80 and less than \(90 .\) What range of grades on the final exam will result in earning a B? Use interval notation to express this range.
Write each sentence as a linear inequality in two variables. Then graph the inequality. The \(y\) -variable is at least 2 more than the product of \(-3\) and the \(x\) -variable.
The percentage, \(p,\) of defective products manufactured by a company is given by \(|p-0.3 \%| \leq 0.2 \% .\) If \(100,000\) products are manufactured and the company offers a \(\$ 5\) refund for each defective product, describe the company's cost for refunds.
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