Complementary Angles is a pair of any two acute angles that add up to make 90 degrees
90-80 = 10
the angle is 10 degrees
C is the correct answer
The given points are
P = (-4,11)
Q = (-5,8)
The x-component of vector QP is
-4 - (-5) = 1
The y-component of vector QP is
11 - 8 = 3
The vector QP is
(1,3) or

The magnitude of the vector is
√(1² + 3²) = √(10)
Answer:

The magnitude is √(10).
A because everything after the verb is a preposition
If the sum of their lengths is 5,520 miles then River D is 2360 and River C is 3160