Three vectors A,B and C have the following x and y components Ax = 3.6, Ay=-3.4; Bx=-5.5, By=1.9; Cx=2.5, Cy=3.4

What is the magnitude of A+B+C?

Magnitude=3.6+3.4i + 5.5+1.9i + 2.5+3.4i

= (3.6+5.5+2.5) + (3.4i+1.9i+3.4i) =
11.6 + 8.7i=Sqrt(11.6^2 + 8.7^2) = 14.5