Question

I inserted a image of the question I’m very confused and need help with homework so I do good on test

Answer 1

To find the magnitude of a vector we use the following equation

$\lvert\vec{v}\rvert=\sqrt[]{(v_x)^2+(v_y)^2}$

This comes from taking the value of the hypotenuse by Pythagoras, graphically it can be seen in the following image:

In the case of your exercise, the values would be

$\begin{gathered} v_x=x \\ v_y=y \\ \lvert\vec{v}\rvert=\sqrt[]{(x_{})^2+(y)^2} \end{gathered}$