Answer:
3ft
Step-by-step explanation:
Answer:
C, 
Step-by-step explanation:
, is a horizontal line, which makes it vertical to the y-axis
He would have 21 before he bought the 10 stamp because 31-10=21
Answer:
60
Step-by-step explanation:
Answer:
The center of circle is
Step-by-step explanation:
We need to find the center of the circle of the equation 
Since, the general equation of circle is 
Where (h,k) is center of circle and r is radius.
Re-write the circle equation is
as,

Compare
with 
so, 
Hence, the center of circle is 