Answer:
Step-by-step explanation:
180° - 2 × 31° = 118° is measure of an angle which is vertical to ∠ECD ⇒
m∠ECD = 118°
Answer:
slope= -5
Step-by-step explanation:
Correct Me, If i am Wrong.
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Answer:
You can't do that. There is no answer
Answer:
See below
Step-by-step explanation:
3. What are two ways that a vector can be represented?
Considering a vector
in some vector space
we have

This is the component form. I don't like that way. It is probably used in high school, but
is preferable because the inner product on
is defined to be

You can also write it using linear form such as 
4.
For this question, I think you meant
vectors


Once

Considering that the dot product is

and the norm of
is 
and the norm of
is 
Thus,

