1.Laila's savings in a bank is $40 .Every end of the week,Laila always draws $3 from her saving,At the same time ,Tina always deposit (存款)$2.4 into her saving ,After how many weeks will Laila's saving be $6more than Tina's saving?2.I plan to to
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1.Laila's savings in a bank is $40 .Every end of the week,Laila always draws $3 from her saving,At the same time ,Tina always deposit (存款)$2.4 into her saving ,After how many weeks will Laila's saving be $6more than Tina's saving?2.I plan to to
1.Laila's savings in a bank is $40 .Every end of the week,Laila always draws $3 from her saving,At the same time ,Tina always deposit (存款)$2.4 into her saving ,After how many weeks will Laila's saving be $6more than Tina's saving?
2.I plan to to travel by car fromn city A to city B .I travel the first half of the distance wiwh the speed of 30km/hour,what speed should I take for the second half of the distance?
3.一辆汽车和一辆摩托车同时从甲乙两地相对开出,汽车每小时行65千米,摩托车每小时行40千米,当汽车行到两地中点处时,与摩托车还相距75千米,甲乙两地相距多少千米?
1.Laila's savings in a bank is $40 .Every end of the week,Laila always draws $3 from her saving,At the same time ,Tina always deposit (存款)$2.4 into her saving ,After how many weeks will Laila's saving be $6more than Tina's saving?2.I plan to to
甲乙两地相距390KM,汽车和摩托车使用时间相同,假设时间为t,那么65t=40t+75,t=3小时,距离就为65*3*2=390km
65-40=20千米
75/20=3小时
3*65+3*40+75=390千米
甲乙两地相距390千米。
1.大概意思是Laila的银行账户上有40美元,每周末,Laila取出3美元,同时,Tina存入2.4美元,
问,几周后,Laila的银行账户上的钱比Tina多6美元?
设;x周
(40-3x)-2.4x=6
x=6有三分之二
所以是6周正确答案是10周!那就是翻译错了 我不太懂英语...
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1.大概意思是Laila的银行账户上有40美元,每周末,Laila取出3美元,同时,Tina存入2.4美元,
问,几周后,Laila的银行账户上的钱比Tina多6美元?
设;x周
(40-3x)-2.4x=6
x=6有三分之二
所以是6周
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65-40=25千米
75/25=3小时
65+40=105千米
105*3+75=390千米
设两地之间的距离为X,1/2X=65t 则65t-40t=75
所以 t=3
X=390,