Question

Find the indicated quantity

Answer 1

`u= < 8,8 > \hspace{5em}v= < -9,4 > \hspace{5em}w= < 8,-2 > \\\\[-0.35em] ~\dotfill\\\\ \stackrel{ \textit{dot product} }{(u\cdot v)}\implies (8)(-9)~~ + ~~(8)(4)\implies -72+32\implies -40 \\\\[-0.35em] ~\dotfill\\\\ \stackrel{ \textit{dot product} }{(u\cdot w)}\implies (8)(8)~~ + ~~(8)(-2)\implies 64-16\implies 48 \\\\[-0.35em] ~\dotfill\\\\ (u\cdot v)~~ - ~~(u\cdot w)\implies -40~~ - ~~48\implies \text{\LARGE -88}`