Answer:
13
Step-by-step explanation:
If ABC is equilaterteral then all the angles must be equal and 60°
8x - 44 = 60 add 44 to both sides
8x = 104 divide both sides by 8
x = 13
No 12.14 is not bigger than 12.44
12.14 < 12.44
Swapping rows alters the sign of the determinant:

Multiplying a single row by a scalar scales the determinant by the same amount:

Then

Answer: D. The moon is located perpendicular to Earth and the sun.
Step-by-step explanation: I studied astronomy. :)