For each equation, determine whether it represents a direct variation, an inverse variation, or neither, Find the constant of variation when one exists and write it in simplest form, \( y=\frac{x}{5}, \quad k=\square \) Direct variation Constant of variation: Neither

Resuelve la desigualdad de valor absoluto: \(|x| < 3\)

(ס) \( \frac{4(a-9)}{36(9-a) x^{3}} \)

Simplify the following expressions fully: \( 1.2 .1 \quad(x+2)\left(x^{2}-x+3\right) \)

(12) If \( 4 n \geq 9 \), what is the least possible value of \( 4 n+1 ? \)

Jika \( \left(\begin{array}{cc}-2 & 2 \\ 5 & y\end{array}\right)\left(\begin{array}{ll}5 & 3 \\ x & 4\end{array}\right)=\left(\begin{array}{cc}-6 & 2 \\ 27 & 19\end{array}\right) \), cari nilai \( x \) dan \( y \). If \( \left(\begin{array}{cc}-2 & 2 \\ 5 & y\end{array}\right)\left(\begin{array}{ll}5 & 3 \\ x & 4\end{array}\right)=\left(\begin{array}{cc}-6 & 2 \\ 27 & 19\end{array}\right) \), find the value of \( x \) and \( y \).