Coordinates of the center: ( 4, 4 )
The radius: r = 7 - 4 = 3
The equation of a circle:
( x - 4 )² + ( y - 4 )² = 3²
x² - 8 x + 16 + y² - 8 y + 16 = 9
x² + y² - 8 x - 8 y + 32 - 9 = 0
Answer:
A ) x² + y² - 8 x - 8 y + 23 = 0
2+2=4 Umm why are you asking this?
SA = 4 * (pi) * r^2......solving for (pi)
divide both sides by 4r^2
SA / (4r^2) = (pi)
Working with fractions, huh? They are not as hard as you may think.
Just think:
1/4 = 2/8
3/4= 6/8
So...
9 3/4 = 9 6/8
Step 2.
9 + 1 = 10
6/8 + 1/8 = 7/8
Step 3
10 and 7/8
Step 4
Simplest answer
10 7/8,
(can't get more simplified than that)
Hope this helps! :)
Answer:
r > -1.
Step-by-step explanation:
2r - 1⅔r ＞ -⅓
1/3 r > -1/3
r > -1/3 / 1/3
r > -1.
