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以一个 S3 -21 -- 4x squared + 33x - 21 equals 0 solve the quadratic equation
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Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items
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There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?
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以一个 S3 -21 -- 4x squared + 33x - 21 equals 0 solve the quadratic equation ...
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