Activity 13.1 Describe the levels of management in your school Draw a diagram, similar to figure 131 showing the levels of management in your school. Identify the people at cach of these levels and describe their responsibilities.

Write a system of linear equations represented by the augmented matrix. (Use \( x, y \), and they appear in the augmented matrix. Do not perform any row operations.) \( \left.\qquad \begin{array}{rrrr}3 & 0 & 2 & \vdots \\ 0 & 1 & -4 & -13 \\ 9 & 5 & 0 & 7 \\ 5\end{array}\right] \)

Use the Gauss-Jordan method to solve the following system of equations. \[ \begin{array}{r}2 x-5 y+3 z=9 \\ 2 x+4 y-\quad z=13 \\ 6 x-6 y+5 z=31\end{array} \] Select the correct choice below and, if necessary, fill in the answer box to complete

Zado: ECOGRAFIA PELVICA GINECOLOGICA TR RNSYAGINAL

Match each equation on the left to its solution on the right. Some answer choices on the right will be used more than once. \( \begin{array}{ll}6-3 x=9 x+6 & x=\text { all real numbers } \\ 2(5 x-2)=10 x+4 \\ 8+2 x=2(x+4) & \text { no solution } \\ 3 x-3=-3(2-x) & \end{array} \)

\( y+x=2 \) and \( x^{2}+3 x y+8=0 \)