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OpenStudy (anonymous):
what is the average (arithmetic mean) of x^2+2x-3, 3x^2-2x-3 ,and 30-4x^2?
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OpenStudy (kropot72):
The sum of the three expressions is 24. The terms in x cancel in the addition. Therefore the AM is 24/3 = 8
OpenStudy (bradely):
Arithmetic mean= ((x^2+2x-3)+( 3x^2-2x-3)+(30-4x^2))/3 =24/3 =8
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