急問數學 急送二十點 =)
唔該比埋條式，識答幾多得幾多＊
識答最多同埋岩既就會選戈個＊plz!
１；（１-３５％）P=０.６５P
＊ ＹＥＳ／ＮＯ
２；〔ｐ；１７〕
寫出３個數，它們的和是正數，而積是負數。
Answer；The 3 number are ___ , ___ and ____.
Sum〔和〕；___ + ___ + ___ = ?
Product〔積〕；____x ____ x ____ = ?
３ａ；〔ｐ；２１〕
印製ｐ本雜誌的總成本是（１５００＋６ｐ）元。
印製２５０本的雜誌的總成本是多少元？
３ｂ；承上題，平均每本雜誌的成本是多少元？
４；〔ｐ；２９〕
盒中有ｍ個紅球和ｎ個白球，若紅球的數量是白球的４５％，
而每種球的數量都少於５０，寫出兩組ｍ和ｎ的值。
５；〔ｐ；２１〕
ｎ粒糖果共重１５ｎ，若一包糖果有４８粒，這包糖果重多少克？
６；〔ｐ；２７〕
If P x（１＋３０％）＝Q, Then Q = P x（１－３０％）
７；〔ｐ；５９〕
玩具公司有職員３５０人，
其中男職員佔３６％，女職員共有多小人？
８；〔ｔｅｓｔ；１〕
ａ；The greatest 2-digit prime number is _____.
ｂ；The general term of a sequence is An=40-3n.〔N是次方喇〕
The 2nd and the 3rd terms of the above sequence are ___ and ____.
The _________ rerm is 4 .
ｃ；Which of the following is not a spuare number?
＿ A;16 B;36 C;156 D;196
ｄ；（-１２）＋（-７）x４＝
〔括號〕←唔需要理～
求下大家幫下我 a___a"
識答幾多得幾多＊急問數學 急送二十點 =)
2008-08-04 7:32 am
回答 (3)
2008-08-04 10:33 am
✔ 最佳答案
1) (1-35%) p=0.65pAnswer: No, it should be 65%, because 35% = 0.35, therefore 1-0.35 = 0.65 = 65%
2) Let x = -1, y=1, z=2
x ＋ y ＋ z =-1＋1＋2 = 2
x . y. z = -2
3) a. the cost of 250 books = $1500 ＋ (6 x 250)
= $3000
b. the cost for each book = $3000/250
=$12
4) Let m = red balls, n= white balls,
so, m=0.45n, Let n = 40, therefore m=18
answer: red balls = 18 pcs. and , white balls = 40 pcs.
5) n pcs. = 15n gram, therefore, each pc. weighs 15 gram
=15 x 48 = 720 gram.
6) if p x (1 ＋ 30%) = Q, the Q= p x (1 -30%)
answer: No, it is wrong.
7) male employees= 350 x 36/100 = 126 persons
female employees = 350-126 = 224 persons
8) a) The greatest 2 digit prime number is 97.
b) ??? Can you give more details?
c) C=156 (not a square number)
d) (-12)＋(-7)x4 = -12-7x4 = -12-28 = -40
2008-08-04 02:45:40 補充：
8b) An=40-3n -----1st term is 40-3^2 = 31
2nd term is 40-4^2 = 24
3rd term is 40-5^2=15
4th term is 40-6^2 = 4
ALL COMPLETED
2008-08-04 02:53:15 補充：
4) red balls = 18 pcs.
white balls = 40 pcs.
Another answer can also be: red balls = 9 pcs. white balls = 20 pcs.
2008-08-04 6:04 pm
1) yes
2)-1,2,3 -1+2+3=4 -1x2x3=-6
3a)(1500+6x250)=1500+1500=3000
3b)3000/250=12
4)N=40M=18 N=20 M=9
5)720
6)no
7)224
8)97,93
b)??
c)C
d)-40
2)-1,2,3 -1+2+3=4 -1x2x3=-6
3a)(1500+6x250)=1500+1500=3000
3b)3000/250=12
4)N=40M=18 N=20 M=9
5)720
6)no
7)224
8)97,93
b)??
c)C
d)-40
2008-08-04 8:20 am
1. YES
2.-1,2,3 -1+2+3=4 -1*2*3=-6
3a.(1500+6*250)=1500+1500=3000
3b.3000/250=12
4.N=40M=18 N=20 M=9
5.720
6.NO
7.224
8.97,93
b.i dont understand
c.C
d.-40
2.-1,2,3 -1+2+3=4 -1*2*3=-6
3a.(1500+6*250)=1500+1500=3000
3b.3000/250=12
4.N=40M=18 N=20 M=9
5.720
6.NO
7.224
8.97,93
b.i dont understand
c.C
d.-40
參考: me
收錄日期: 2021-04-12 01:41:05
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