Answer
$\vec{u}=-2\vec{i}+10\vec{j}$
Work Step by Step
$\vec{u}=\langle-2,10\rangle$
To write in terms of $\vec{i}$ and $\vec{j}$, just write the first component of $\vec{u}$ times $\vec{i}$ plus the second component of $\vec{u}$ by $\vec{j}$:
$\vec{u}=\langle-2,10\rangle=-2\vec{i}+10\vec{j}$
