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Mathematics, 17.07.2021 03:50, squidmeat12
Combine like terms and simplify (−3 + 4x2 − 4x) + (−1 − 3x2− 4)
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Answers: 2
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1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?
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Combine like terms and simplify (−3 + 4x2 − 4x) + (−1 − 3x2− 4)...
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