Fred's final mark in an online course was determined entirel
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Fred's final mark in an online course was determined entirely by two exams.The mid-term exam was out of x marks and was worth 25% fo his final mark.The final exam was out of 2x marks and was worth 75% of his final mark.Fred scored 40 marks on the first exam and 60 marks on the second exam.Determine the value of x if Fred earned a final mark of 50% in the course.
由题,可列方程
(40/x) ×0.25 + [60/(2x)]×0.75 =0.5
即,(10/x) + (22.5/x) =0.5
32.5/x =0.5
解得,x=32.5/0.5=65
so,the value of x is 65
(40/x) ×0.25 + [60/(2x)]×0.75 =0.5
即,(10/x) + (22.5/x) =0.5
32.5/x =0.5
解得,x=32.5/0.5=65
so,the value of x is 65
Fred's final mark in an online course was determined entirel
英语翻译Fred's final mark in an online course was determined ent
FRED'S
Mark Twain was an American writer.
英语翻译"In spite of her mounting debt ,Gabrielle was determined
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英语翻译It was the final examination for an introductory Biology
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翻译 It's better to have online course than traditional ones
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判断正误 mark twain was an American writer
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