Find $| v |$ And $| \mathbf { u } + \mathbf { v } |$

Essay

Find $| v |$ and $| \mathbf { u } + \mathbf { v } |$ , given that $\mathbf { u } = \langle 2,3 \rangle$ and $\mathbf { v } = \langle - 1,2 \rangle$ .