2. \( 1 \frac{1}{4 x}-5 \frac{3}{8}=-6 \frac{1}{2} \)

\( \begin{array}{r}3 x+5 y=5 \\ -2 x-8 y=6\end{array} \longrightarrow \times \begin{array}{r}6 x+10 y=10 \\ \times 3 \\ +6 x-24 y=18\end{array} \) (4) Solve the system of equations. (4) The solution is \( (\square, ?) \)

Which of the following values make the inequality \( x \leq 16.3 \) true? Select all that apply. -3 16.3 08 032 \( \frac{1}{4} \) 18.5

b) \( y=2 x-\frac{1}{2} \)

Find the determinant of the matrix. \( \operatorname{det}\left[\begin{array}{ccc}3 & -10 & 6 \\ 0 & -6 & -1 \\ 0 & 0 & -10\end{array}\right]=\square \)

Simplify the expression using the properties of exponents. Expand any numerical portion of your answer and only include positive exponents. Answer \[ \left(2 x^{-2}\right)^{-1} \]