The equation of a circle is (x - h)^2 + (y - k)^2 = r^2
x and y are left alone in a circle equation, while h and k are the coordinates of the center.
Thus, our equation is (x - 7)^2 + (y + 2)^2 = 61
A. 36, the reason being is because 18x 2 is 36 and 12 x 3 is 36
9/10(3x+12y+-6z) is the expression, simplified it's:
2.7x+10.8y-5.4z
Hope this helped!
How much pain would you find? hopefully none, since you'd have lots of pens and pencils :).
