Question

What's the area of a circle with a circumference of 10π

Answer 1

C=10pi
C=2(r)pi so r=5
A=pi(r)^2
so A=pi(5)^2

A=25pi

Answer 2

y=6/5x+5
12x=10y-50

12x      10y-50    
------ = ----------
12           12