Answer:
52/ 10 = 5 2/10 or 5 1/5
Step-by-step explanation:
first turn the mixed fractions into improper fraction
13 1/10= 131/10
7 9/10= 79/10
since the two fractions already have a common denominator just subtract
131 - 79 = 52
52/ 10 = 5 2/10 or 5 1/5
9: B right
10: C obtuse
11: B right
12: B right
I hope they are right! Sorry if they are not!
Answer: 0.0049 hope this is right
Answer:

Step-by-step explanation:
The magnitude of vector
is given by 
The magnitude of vector
is
.

The magnitude of vector
is
.

Therefore,
