Cone's volume is

where S - surface area, h - height
Surface area =

r = 18/2=9
h= 14
π = 3.14

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Answer:
x and y are the variables
Sorry, but I don't see any information for me to use to answer that question.
Answer:
18
Step-by-step explanation:
When x equals -3, then the first equation is simplified to 9 + 6 + 3 = 18; and the second equation confirms the same answer by showing -6 x -3 = 18