The value of $k$for which the lines $2x-3y+k=0$ $3x-4y-13=0$ and $8x-11y-33=0$ are concurrent, is 

If given lines are concurrent, then 

$\left|\begin{array}{l}2- 3\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em} k\\ 3\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}-4- 13\\ 8-11- 33\end{array}\right|=0\Rightarrow -22+15-k=0\Rightarrow k=-7$