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student1187

8 9

Math

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  • tutor_fran
    2018-10-18 17:40:31

    9) let the number of male is x, female is y, then, 2y=x, x+y=16
    3y=16, y=5.3333333, because at most carry 16, if y=5, x=2y=10, then 10+5=15.
    we find that the max female y=5.
  • student1187
    2018-10-18 17:48:12
    第8题尼老师
    •  tutor_fran 2018-10-18 17:40:31
    • 9) let the number of male is x, female is y, then, 2y=x, x+y=16 3y=16, y=5.3333333, because at most carry 16, if y=5, x=2y=10, then 10+5=15. we find ..
  • student1187
    2018-10-18 17:52:18
    8题会不会
    •  tutor_fran 2018-10-18 17:40:31
    • 9) let the number of male is x, female is y, then, 2y=x, x+y=16 3y=16, y=5.3333333, because at most carry 16, if y=5, x=2y=10, then 10+5=15. we find ..
  • tutor_fran
    2018-10-18 17:55:01
    不會,我要想一想,你括號是不是填錯了,是不是X-2才對?
    •  student1187 2018-10-18 17:52:18
    • 8题会不会
  • student1187
    2018-10-18 17:56:00
    是,可能是的。
    •  tutor_fran 2018-10-18 17:40:31
    • 9) let the number of male is x, female is y, then, 2y=x, x+y=16 3y=16, y=5.3333333, because at most carry 16, if y=5, x=2y=10, then 10+5=15. we find ..
  • student1187
    2018-10-18 17:58:49
    Sir 你会不会
    •  tutor_fran 2018-10-18 17:40:31
    • 9) let the number of male is x, female is y, then, 2y=x, x+y=16 3y=16, y=5.3333333, because at most carry 16, if y=5, x=2y=10, then 10+5=15. we find ..
  • student1187
    2018-10-18 18:01:31
    是不是7.6
    •  tutor_fran 2018-10-18 17:40:31
    • 9) let the number of male is x, female is y, then, 2y=x, x+y=16 3y=16, y=5.3333333, because at most carry 16, if y=5, x=2y=10, then 10+5=15. we find ..
  • tutor_fran
    2018-10-18 18:02:44
    大的數是X,小的數是X-2, 括號只需要填2就OK,那麼根據題目,3X-(X-2)>25, 2X+2> 25, 2X>23, X>11.5, 那麼最小的X應該是12, 這是我的想法,不知道對不對,你再請教一下其他老師吧
    •  student1187 2018-10-18 17:56:00
    • 是,可能是的。
  • student1187
    2018-10-18 18:07:20
    呀sir 可不可以check 下这个

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  • tutor_fran
    2018-10-18 19:47:29
    no problem
    •  student1187 2018-10-18 18:07:20
    • 呀sir 可不可以check 下这个
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