해법
해법
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A.T.Q.:
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The product of two consecutive integers is 420. Which quadratic equation can be used to find x, the lesser numberWhen 70% of a number is added to the number, the result is 255.two less than a numberIf the sum of three times a number and two times the same number is increased by 3, the result is 28. Find the number.calculate the simple interest earned on an investment of 6600 at 2.5% per quarter for 10 years. Give your answer to the nearest cent.