Answer:
LETTER A
Step-by-step explanation:
I think it's correct
Answer:

Step-by-step explanation:
A circle centered at (0,0) with radius r is 
Since your circle has diameter of 12, then its radius is 6. Then 
So a possible answer is: 
If you want to move the location of the center, but keep it on the x-axis, then add or subtract a number to the x, such as this:

The center of this circle would be (-4, 0) which is still on the x-axis.
Answer:
-5=x
Step-by-step explanation:
-30=5x+5
-25=5x
-5=x
oml! ill try give me a min tho