U . v = |u| . |v| cos 60 = 10 * 8 * 0.5 = 40 This is called the scalar (or dot) product.
Answer:

Step-by-step explanation:
AB would be (n) * (2n + 6). We need to distribute the n, so we multiply the n by each term within the parentheses and add those products together:
AB = 
C is just
, and we subtract this from
:

Thus, the answer is
.
Hope this helps!
Answer:
10
Step-by-step explanation:
substitute the value
multiply
subtract
Answer:
1.75
Step-by-step explanation:
Hope this helps