**1. The problem statement, all variables and given/known data**

Given the following vector components of vectors

**C**and

**D**:

*Cx*= 8.10,

*Cy*= -5.40,

*Cz*= -7.90,

*Dx*= 4.40,

*Dy*= -2.50,

*Dz*= 4.50,

find the

*x, y, z*components of their sum.

**2. Relevant equations**

No relevant equations that I know of....

No relevant equations that I know of....

**3. The attempt at a solution**

I am lost completely. I do understand using (x,y) components, as well as use of the Pythagorean theorem for right triangles, etc....

The z component is throwing me off completely. Do I use the (-) as an indication of direction? Does Z represent a hypotenuse?

Im so confused.