Algebra Archive: Questions from September 17, 2022
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\( \begin{array}{rlr}x+y+3 z & =6 \\ y+2 z+w & =7 \\ x+3 y+5 z+2 w & =13 \\ x+y+3 z+w & =6 \\ (x, y, z, w)=\left(0,-\frac{9}{2}, 0, \frac{7}{2}\right.\end{array} \)1 answer -
r. \( \quad \sin \theta_{c}=\frac{n_{1}}{n_{2}} \quad, \theta_{c}= \) s. \( q V=\frac{1}{2} m v^{2} \quad, v= \) t. \( \frac{1}{f}=\frac{1}{s_{o}}+\frac{1}{s_{i}} \quad, s_{i}= \)1 answer