You are given three displacement vectors: with magnitude 5.0 m in the direction of 60o below the negative x-axis, vector, has an x-component of +2.5 m and a y-component of +6.0 m and vector has magnitude of 2.5 m in the negative y-axis.

Answer 1

three vectors: Break up each into component vectors, and add.
R= A + B + C
R= 5cos150 j +5sin150 i + 2.5 i + 6 j +2.5(-j)
check those, angles from + y axis.