Answer:
the answer is b
Step-by-step explanation:
b is 9 thank you
Circumference of a circle is 2 x pi x r
Answer:
C
Step-by-step explanation:
if you don't know it choose C
Answer:
Step-by-step explanation:

x² - x - 12 ≠ 0
x² - 4x + 3x - 12 ≠ 0
x (x - 4) + 3 (x - 4) ≠ 0
(x + 3)(x - 4) ≠ 0
x ≠ -3 or x ≠ 4
(B)