Matrix A was expressed in the form of a 2x2
i'm not sure if this helps or not but here you go
Answer:

Step-by-step explanation:
we know that
In the right triangle DEF
----> by TOA (opposite side divided by adjacent side)
substitute the given values

solve for EF

Answer:

Step-by-step explanation:
Given a vector < x, y > then its magnitude is

Given the directed line segment
P (0, 0 ) → Q (3, 2 ) then
PQ = q - p = (3, 2 ) - (0, 0 ) = < 3 - 0, 2 - 0 > = < 3 , 2 >
| PQ | =
=
= 