160 km because 20 hours times 8 km per hour
The radius of a circle is half the length of the circumference.
So multiply 12 by itself and you get 24.
The answer is C.
You would have to add a positive 6 to the negative 6 to get zero. Lets say you have -2 in order to get it to zero or just any positive number, you have to add a positive of the same value or higher to be able to get it there. I hope you understand that.
A. Always
These lines<span> are </span>perpendicular<span> since their slopes are negative reciprocals.</span>
