In Tim's house,a rectangular swimming pool whose length 30 meters and width 10 meters is surrounded by grass.The pool with the grassy area makes a large rectangle whose length is 50 meters ang width 20 meter.Draw the picture first then answer:What ar
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In Tim's house,a rectangular swimming pool whose length 30 meters and width 10 meters is surrounded by grass.The pool with the grassy area makes a large rectangle whose length is 50 meters ang width 20 meter.Draw the picture first then answer:What ar
In Tim's house,a rectangular swimming pool whose length 30 meters and width 10 meters is surrounded by grass.The pool with the grassy area makes a large rectangle whose length is 50 meters ang width 20 meter.Draw the picture first then answer:What arrea is occupied by the grass
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A telephone company charges initially $0.50 ang then $0.11 for every minute.Write an expression that gives the cost of a call that lasts N minute
In Tim's house,a rectangular swimming pool whose length 30 meters and width 10 meters is surrounded by grass.The pool with the grassy area makes a large rectangle whose length is 50 meters ang width 20 meter.Draw the picture first then answer:What ar
Tim的房间里,一个长30米宽10米的长方形游泳池被草坪包围着.带草坪区的游泳池是一个长50米,宽20米的长方形.请先画图,然后回答,草坪所占面积是多少?
电话公司最初收费 $0.50,然后每分钟收费 $0.11.写出公式,表明持续N分钟的电话费用.
The area is 50*20-30*10=700 square meters 0.50+(N-1)*0.11=0.11*N+0.39
1.1000-300=700 2.ang打错了吧,应该是个分段函数
1)
50*20-30*10=700
2)
x=0.5 ; if t<5
x=0.11*n ;if t>=5
呵呵,这都是些什么人做些什么题?
第二题是:
打电话,一开始0.5元一分钟,然后每一分钟加0.11元,问打N分钟要多少钱的公式。
很简单,y=0.5+ 0.11*(N-1)
第一题是,Tim家有个矩形池塘,池塘30米长,10米宽,然后呢,这个池塘又被一大堆草围着,
这样就围成了一个更大的矩形,这个矩形呢,长50米,宽20米...
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呵呵,这都是些什么人做些什么题?
第二题是:
打电话,一开始0.5元一分钟,然后每一分钟加0.11元,问打N分钟要多少钱的公式。
很简单,y=0.5+ 0.11*(N-1)
第一题是,Tim家有个矩形池塘,池塘30米长,10米宽,然后呢,这个池塘又被一大堆草围着,
这样就围成了一个更大的矩形,这个矩形呢,长50米,宽20米,问,这些草共占用了多少面积?
很简单,大矩形面积-小矩形面积就是草的面积,50*20-30*10=700平方米
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