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Chapter 9: Problem 27
Solve each equation for the given variable. $$ \frac{c}{E}-\frac{1}{m c}=0 ; E $$
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Which expression is in simplest form? $$ \begin{array}{ll}{\text { F. } \frac{x^{2}-x}{x^{2}-1}} & {\text { G. } \frac{x^{2}-1}{x^{2}+1}} \\ {\text { H. } \frac{x^{2}-1}{x+1}} & {\text { J. } \frac{x+3}{x^{2}+4 x+3}}\end{array} $$
A standard number cube is tossed. Find each probability. \(P(\text { even or prime) }\)
Which expression can be simplified to \(\frac{x-1}{x-3} ?\) $$ \begin{array}{ll}{\text { A. } \frac{x^{2}-x-6}{x^{2}-x-2}} & {\text { B. } \frac{x^{2}-2 x+1}{x^{2}+2 x-3}} \\ {\text { C. } \frac{x^{2}-3 x-4}{x^{2}-7 x+12}} & {\text { D. } \frac{x^{2}-4 x+3}{x^{2}-6 x+9}}\end{array} $$
Solve each equation. $$ \sqrt{x+3}-1=4 $$
A month is selected at random; a number from 1 to 30 is selected at random.
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