1.How many pairs of rabbits will there be after 6 months,if each pair produces a new pair each month,and each new pair begins to bear young two months after its own birth?
2.If 9 is subtracted from a numberx,the result is 27.Find the number.
3.Divide $790 between A,B and C so that A has $150 more that B,and B has $80 more than C.How much does C get.
F.1 math
2007-07-27 1:15 am
回答 (1)
2007-07-27 1:34 am
✔ 最佳答案
1. Let Original pair of rabbits = AAfter 6 months, there will be 21A pairs of rabbits
2. The no is 27+ 9 = 36
3.
A+B+C = 790
(C+150+80) + (C+80) + C = 790
3C + 310 = 790
3C = 790 - 310 = 480
C = 160
B = 160+80 = 240
A = 240+150 = 390
參考: 自己計
收錄日期: 2021-04-12 20:41:10
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