Centre is at the middle or the midpoint of the diameter.
And the formula of midpoint is

For the given question, x1=-4, y1=2, x2=2, y2=-8
So we will get

And that's the required centre .
Answer:
7.5
Step-by-step explanation:
The answer is 7.5 because 18 × 5/12 = 7.5
Answer:
Length: meter
Mass: Kilogram
Volume of a solid: Cubic meter
Volume of a liquid: Liters
Temperature: Degree Celsius
Time: second
The formula for calculating density:

The correct answer is B. Hope this helps!
PI r SQUARED SOUNDS LIKE AREA TO ME,
IF YOU NEED A CIRCUMFERENCE JUST USE PI d
You never heard that song? XD
So do Pi x the radius, squared (12.25^2)
-round to 1 decimal place(?)