Answer
$u+v=-i+2j$
Work Step by Step
We are given that the two vector equations for the vectors $u$ and $v$ as follows:
$u= 2i-5j$ and $v=-3i+7j$
In order to add the two vectors, we will have to add their respective coefficients.
$u+v=(2-3)i+(-5+7)j$
Hence, $u+v=-i+2j$