Answer:
i want to say it is b but i could be wrong
Step-by-step explanation:
The answer is 67.6
You have to find the angle that has cos=8/21=0.381.
A system of equation may have one, zero or infinitely many solutions
The system of equation has no solutions
The systems of equation are given as:

Substitute -6x - 5 for y in 

Open brackets


Subtract 12x from both sides of the equation

The above equation is not true i.e.
Hence, the system of equation has no solutions
Read more about solutions of equations at:
brainly.com/question/9338739