Finding magnitude and direction of vectors help

[Encarta]

Homework Statement

Given the following force vectors: A is 27 lb at an angle of 28° clockwise from the +x-axis, and B is 44 lb at an angle of 52° clockwise from the +y-axis.
(a) Using the method of components find the magnitude and angle of the vector C such that 2A + C − B results in a vector with a magnitude of 38 lb pointing in the +x direction.

Homework Equations

Horizontal component of a Vector A = A * cos \Phi
Vertical Component of a Vector A = A* sin \Phi
tan \Phi = Vertical component of A/horizontal component of A
Pythagorean Theorem

The Attempt at a Solution

To solve this, I've calculated the x and y components of vectors A and B, but do not know where to go from here. The closest I could get to an answer was I drew the vectors in coordinate system and drew the resultant vector that was asked of me. But I have no idea how to proceed with finding the magnitude and the exact direction.
A, B, and C are vectors.
Thanks for explaining.

 

[Kurdt]

Here is a resource for vector addition you may find useful.

http://hyperphysics.phy-astr.gsu.edu/hbase/vect.html

 

[Encarta]

Thanks, that helped.