16. A hockey team charges \( \$ 15 \) for gold seats, \( \$ 8 \) for blue seats, and \( \$ 5 \) for red seats. a) Write an expression that describes the total earnings from ticket sales. b) Identify the coefficients and variables and describe what they mean. c) How much will the tearm earn if they sell 1500 gold, 1800 blue, and 910 red seats?

In the xy-plane, the line determined by the points \( (3, m) \) and \( (m, 12) \) passes through the origin. Which of the following could be the value of \( m \) ? A. -6 B. 9 C. 1 D. 0

2. \( \tan (\theta)+\cot (\theta) \equiv \sec (\theta) \cdot \csc (\theta) \)

2. \( 27^{1-x}=\frac{1}{81} \)

\begin{tabular}{l} Rewrite the expression with a positive rational exponent. Simplify, if possible. \\ \( 81^{-1 / 2} \) \\ \hline\( -\square \)\end{tabular}

5. Simplify as much as possible. \( \begin{array}{ll}\text { a. }\left(2 x^{3}\right)^{2}\left(3 y^{2}\right) & \text { b. }-5 x+x+10 \\ \text { c. }\left(x^{2}+4 x-1\right)+\left(x^{2}-6 x+11\right) & \text { d. }(-2)^{6} \\ \text { e. } \sqrt{16}+(-16) & \text { f. } 5-(-20) \\ \text { g. }-20-3(-2) & \text { h. } 2 x-3 x-10 x\end{array} \)