Select all the ordered pairs that are solutions to the equation 2x+y=−12. (−10, 8) (−9, −6) (−8, −2) (0, −12) (4, −20)
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The equation for the area of a circle is: 
. Insert 9 as your radius (r) into the equation and solve:
\pi 9^2 = 254.469
\pi 9^2 = 254.469
