If x is equal to the sum of the even integers from 40 to 60, inclusive, and y is the number of even integers from 40 to 60, inclusive, what is the value of x + y ?
550
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560
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572
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y is the number of even integers from 40 to 60……意思是count the numbers....lol..
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y is the number of even integers from 40 to 60……意思是count the numbers....lol..
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