几道题目看得晕晕滴..数学

stacyUID: 2131660

一：Two high school track and field teammates,Olga and Vanessa,are entered in a 4000_meter race,which is to be run in 200_meter laps around an indoor track.Olga runs the race at an average speed of 250 meters per minute,whele Vanessa runs it at an average speed of 200 meters per minute.At the moment Olga completes the race,how many laps behind is Vanessa?
Anwser:4......


" n/ K' J( [7 O* Q我这道題虽然是蒙对了。。可是红色部分看不懂啊。。LAP??什么意思。。。以下我的做法
5 \+ `# F. s) u8 a. N& x* i4000/250=16
) |/ f9 s- f- b3 Y( p! c0 z200*16=3200
: `" L: z# \+ n$ g# G. N4000-3200=800
9 Z$ d  M0 n, _9 X8 L) V9 m800/200=4...........
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5 P9 y- D" D, s" S2:以下这道想问下AT LEAST 11是什么意思。。。我的理解是大于11。。对吗
) J" |. ^' Q1 l4 h0 `8 c) NIf the result of step 2 is at least 11,subtract 9 from that number.
If the result of step2 is not at least 11,........
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3：
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2 v; q2 k  n0 Q% VType of Fruit        Number of Pieces of Fruit in a Display        Number of Displays in Store
      
Apples                   25                                                              4
: z" T9 _( M1 G; _7 oOranges                 13                                                             3
1 I/ }( a* O) bBananas                50                                                               5

William keeps an inventory of the fruit he displays in his grocery store.The table above accounts for the number of pieces of fruit in a display as well as the number of displays in the store.According to the table,how many total oranges and bananas are displayed in the store?
anwser:289

这上这道真的看不懂。。。。。难过。。。。。

  C. N3 T8 w$ w, O2 e2 C4 g

. _3 D: I8 B3 h) X6 B  q" F) |' Y  C0 [
- U* g# N+ p, {! v还有最后一个小小的问题。。。。H and S vary indirectly
H是说平均每天看电视时间。。。S是说成绩高低。。。。
) y3 g' U! a0 ^图上画的是成反比关系。。。那反比就是indirectly吗
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/ z. Q0 @( ?# I. p- M. @[ 本帖最后由 stacy 于 2006-4-13 18:57 编辑 ]

点点阳阳UID: 2151229

3x-4=x+2,x=?

stacyUID: 2131660

谢谢楼上的～～～～还有一点问题。。。。。希望有人帮忙下啦！！谢谢...

daisy07UID: 131728

Two high school track and field teammates,Olga and Vanessa,are entered in a 4000_meter race,which is to be run in 200_meter laps around an indoor track.Olga runs the race at an average speed of 250 meters per minute,whele Vanessa runs it at an average speed of 200 meters per minute.At the moment Olga completes the race,how many laps behind is Vanessa?|

* j' T5 @' ^; P0 R* |/ Z% ~  j+ ALap in the context should be a circle around the track.
0 o* ?2 t% H) ]$ X. i1 |So o=4000/250=16 min  v=4000/200=20 min
$ d9 p* ?. v; D( k3 M; XAt the moment Olga completes the race, Vanessa has run 16*200=3200 meters
Vanessa is 4000-3200=800 meters behind Olga
(800 meter) /(200 meter/lap)=4 laps

daisy07UID: 131728

William keeps an inventory of the fruit he displays in his grocery store.The table above accounts for the number of pieces of fruit in a display as well as the number of displays in the store.According to the table,how many total oranges and bananas are displayed in the store?

0 {: S% J0 n6 c5 F+ dtotal oranges=13 (numbers of oranges in a display)*3 (numbers of displays)=39
total bananas=50*5=250
total=39+250=289

点点阳阳UID: 2151229

1。which is to be run in 200_meter laps around an indoor track指每圈200米
  B- l. Z4 j( P# r; c8 s. h     how many laps behind is Vanessa问Vanessa比Olga慢几圈。
2。我认为是大于或等于
1 u) p% \# @% N) Y% \5 r9 J3。 Number of Pieces of Fruit in a Display指每个摊位里水果的数量。
      Number of Displays in Store指商店里摆放水果的摊位。
一共39oranges，250bananas，加起来 total oranges and bananas 289
8 ?# Y' m2 @$ n/ Cvary indirectly ：反比

stacyUID: 2131660

谢谢大家～～我都明白了～