標題:
F.1英文數學題
發問:
a.)In a Mathematics competition, there are 10 questions of equal marks. You get 10 marks for a correct answer, lose 8 marks for a wrong answer, or no marks for each blank answer. If Jimmy answered 3 questions correctly, 6 questions wrongly, and left 1 question unanswered, how many marks could he get?b.)12% of x... 顯示更多 a.)In a Mathematics competition, there are 10 questions of equal marks. You get 10 marks for a correct answer, lose 8 marks for a wrong answer, or no marks for each blank answer. If Jimmy answered 3 questions correctly, 6 questions wrongly, and left 1 question unanswered, how many marks could he get? b.)12% of x is 25% of 48, find x. c.)60% of y is 20% of 150,find y. 過程+答案，thx.
最佳解答:
a.)Jimmy could get =3 x 10 - 6 x 8 - 0 x 1 =30 - 48 - 0 = -18 ∵Jimmy can get 30 marks for the correct answers and lose 48 marks for the wrong answers ∴Jimmy can't get any marks. b.)12%x =25% x 48 12%x =12 0.12x =12 x =100 c.)60%y =20% x 150 60%y = 30 0.6y = 30 y = 50
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其他解答:
因為發問者比較prefer peonly2004，所以畀低分少少|||||其實好易姐,不過我只會一條類似b,c的數你參考,because you do it yourself E.g 50% of x is 10% of 100 50% of x = 10% of 100 (其實is的意思是等於) 50% of x = 100 * 10% ( * =乘) 50% of x = 10 50x =10*100 50x =1000 x = 1000/50 ( / =除) x = 20|||||a 3*10+6*(-8)+1*0 =30-48+0 =-18(marks) b x*12%=25%*48 12%x=12 x=12/12% x=100 c y*60%=20%x*150 60%y=30 y=30/60% y=50|||||a) 3x10+(-8)x6+0= -18 b) 100 c) 50
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