Vector Addition and Magnitude: Q1 & Q2

[Cowtipper]

Question 1:

Homework Statement

Vector A points north and vector B points east. If C = B - A, then vector C points...

A) north of east
B) south of east
C) north of west
D) south of west

Homework Equations

The Attempt at a Solution

I know the answer is "south of east" (or at least I'm 99% sure). But why? I don't understand why, exactly. Can someone please explain? Thanks, I really appreciate the help.

Question 2:

Homework Statement

Vector A is 3.0 units in length and points along the positive x-axis; vector B is 4.0 units in length and points along a direction 150 degrees from the positive x-axis. What is the magnitude of the resultant when vectors A and B are added?

Homework Equations

The Attempt at a Solution

This is an image I made that I think shows what they are talking about. From there, I'm not too sure where to go...

Thanks again.

 

[Kurdt]

For question 1, how is the difference of a vector defined. Or how have you been shown to calculate the difference of a vector.

For question 2, you haven't posted any imagebut what have you learned about vector addition and finding the magnitudes of vectors?

 

[tyco05]

A diagram is your best friend.