Determine o valor de \( m \) para que as retas \( r \) e \( s \) sejam concor- rentes e ache o ponto de interseção, sendo \( r: \frac{x-1}{3}=y+2=\frac{z}{-2} \quad \) s: \( \left\{\begin{array}{l}x=m-t \\ y=1+t \\ z=2 t, t \in R\end{array}\right. \)

Explain why parallel lines in a coordinate plane have equal slopes.

9. Is \( \overrightarrow{G H} \) the same ray as \( \overrightarrow{H G} \) ? ¿Es \( \overrightarrow{G H} \) el mismo rayo que \( \overrightarrow{H G} \) ? (Page 3) (1pt) A. Yes, they are both rays containing \( H \) and \( G \). B. Yes, \( \overrightarrow{G H} \) and \( \overrightarrow{H G} \) go in the same direction. C. No, because they are not both rays. D. No, \( \overrightarrow{G H} \) and \( \overrightarrow{H G} \) go in opposite directions.

Exercice 5: On considère la figure suivante tel que : \( O D B \) et \( O A C \) deux triangles rectangles en \( D \) et \( A \) successivement. \( \begin{array}{l}D B=5 ; O D=a ; O A=2 \text { et } A C=3 \\ \quad>\text { Calculer la valeur de } a ?\end{array} \)

Find the focus, directrix, vertex and axis of symmetry for the parabola Focus \( =\square(y+1)^{2}=-8(x+3) \) Directrix \( =\square \) Vertex \( =\square \)

Write the equation of the circle centered at \( (-9,9) \) with diameter 14.