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钟表的分针旋转一周需要60分钟,分针旋转了120度,时针呢 钟表的分针匀速旋转一周需要60分钟,经过15分,分针旋转了几度,时针旋转了几度? 钟表在5点30分时,他的时针和分针所成的锐角为多少度? Your sports team is selling patriotic pins and ribbons for a fundraiser.the pins are $4 each and the ribbons are $2 each.write an equation to represent the number of pins are ribbons you could sell to raise $60.4x+2y=60 第三题等于多少? 第二题 求过程噢亲 亲,做下4题和2题, 这两道题求过程啊亲. 亲们,第二题... 4(a+1)^2-4(a^2-1)=0 a=-1 a为什么等于-1, 英语翻译First,Young had her staff construct the average age of Northern and Southeast B737-200fleets,by quarter,since the introduction of the aircraft to service by eachairline in late 2001 and early 2002.The average age of each fleet wascalculat 英语翻译1、how many cubes divide x5!x7!(divide 是“除”还是“除以”或是“整除”,x5!x7!就不用翻译拉)2、“A is subtracted from B” 是“A除以B”还是“B除以A”?3、the greatest prime factor 啥意思?4、翻译一 这道题等于多少 钟在5点零8分是,时针与分针的夹角(指小于180°的夹角)是多少度? 8点30分时,钟表的时针和分针夹角是多少? 8点30分时,钟表的时针与分针的夹角为多少度? 在8:30时,时钟上的时针和分针之间的夹角为多少度 Among the 800 people,70% like swimming.how many people like swimming? A girl has brothers and sisters.she has as many brothers as she has sisters.her brothers twice as many sisters as he has brothers.How many children? a car travelled at a speed of 90km/h.it left town ponpon at 11.00a.m.what time will it reach town dondon which is255km away? 英语翻译1.if we write out all the three-digit numbers with the sun of the figeres on each digit equivalent to10 ,and arrane them from great to small,then what is the tenth number in them.（翻译,2.一个等边三角形与一个正六边形的 时钟钟面是8点30分时,时针与分针所成的角度是多少.要说明为什么 若3a的平方-a-2+=0,则5+2a-6a的平方?最好有过程,我是初一的,最好我能看懂 英语写的数学题 看不懂题目~~If n is an odd integer greater than 9, in terms of n, what would be the smallest even integer greater than n ?(A) n + 3(B) n - 5(C) n2(D) 5n(E) n + 1帮忙翻译出来是什么意思好吗? 顺便告诉我答 读不懂题目的意思.请老师详解.小明有4张3分的和3张5分的邮票,用这些邮票中的一张或者若干张能得到多少种不同的邮资? 8点30分,时针和分钟构成的锐角是【 】度. 下午5时30分,时针和分针形成多少度的锐角? 8点40分,时针与分针所构成的锐角是( )度,不要简答 上午7点40的时候,时针和分针所构成的锐角是多少度 根据|a|大于或等于0这条性质,解答下列各题根据∣x∣≥0这条性质,解答下列各题 1)当X取何值时,∣x-3∣有最小值?这个最小值是多少?(2)当X取何值时,4-∣x-3∣有最大值?这个最大值是多少? x的绝对值大于等于零,这条性质,解答下列各题(1)当x是多少时,|x-2l有最小值?这个最小值是多少?(2)当x是多少时,3-|x-2丨有最大值?这个最大值是多少? 丨a丨≥0这条性质,解答下面各题.当a取何值时,丨a－3丨有最小值?这个数最小值是多少?当a取何值时,4－丨a－3丨有最大值?这个数的最大值是多少?