SOLUTION: What is the average (arithmetic mean) of (x� + 4x - 3), (3x� -4x - 6) and (30 - 4x�)?

SOLUTION: What is the average (arithmetic mean) of (x� + 4x - 3), (3x� -4x - 6) and (30 - 4x�)?

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Question 975943: What is the average (arithmetic mean) of (x� + 4x - 3), (3x� -4x - 6) and (30 - 4x�)?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Add them and divide by 3. Add like variables.
(x� + 4x - 3), (3x� -4x - 6) and (30 - 4x�)=0x^2+0x +21/3
21/3 =7

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