Given the center
and the radius
of a circle, its equation is

In your case, the center is (-4,0), and the radius is 2. Plug these values into the generic formula and you'll get the equation.
Answer:

Step-by-step explanation:
x= 1 over 4y-2
Answer: j=t^2+5
Step-by-step explanation:
Answer: Example for ratio: For every 1 bike there are two wheels
Example for rate: A jet is traveling 460 mph
Step-by-step explanation: