x-0.3x=21解方程

分类: 作业答案 • 2023-01-15 17:44:02

问题描述：

x-0.3x=21解方程
340立方厘米=（）立方分米
2.05立方米= （）升
6分之1分=（）秒
8分之3千克=（）克

答

x-0.3x=21
提取公因式x得（1-0.3）x=21
合并同类项得0.7x=21
一次项系数化为一得x=30补充的340立方厘米=（ 0.34 ）立方分米2.05立方米= （ 2050）升6分之1分=（10）秒8分之3千克=（375）克

520除以一个数，商23余14，则除数是（　　）A. 23B. 22C. 21D. 20
两组同学跳绳,甲组有25人,平均每人跳80下,乙组有20人,平均每人比甲乙组的平均数多5个,求两组同学每人平均跳多少下算术法要是用方程的话把解方程的过程写完整哈
520除以一个数，商23余14，则除数是（　　）A. 23B. 22C. 21D. 20
Section A Directions:阅读Mary和Tim之间对话的下一部分,选择will或to be going to将对话补充完整Tim:Did you do all your job?Mary:Almost.Dave spoke to his dad.21 (We’ll / We’re going to) borrow his van.I’ve booked a hotel.22 (We’ll / We’re going to) stop at the hotel on the way to the gig to collect the keys,because we’ll be very late that night.Tim:What about feeding your cats?Mary:Oh no!I completely forgot!23 (I’ll/I’m going to) ask the neighbor.Tim:Don’t worry.24 (I’ll/I’m go
一倒置的试管插入水槽里面有一定体积的NO 通入21L氧气反应后液面不变求原NO体积一倒置的试管插入水槽里面有一定体积的NO 通入21L氧气反应后液面不变求原NO体积
请帮我解决下面的英语作业吧从B栏中找出A栏中各句的应答语.A栏（）1.How are you?（）2.Hello!Is that Paul?（）3.Where’s My sweater,Mom?（）4.Would you like to come to my birthday party?（）5.What day is it today?（）6.Happy New Year!（）7.Can I help you?（）8.Could I use your dictionary?（）9.Jack,your T—shirt is very cool.（）10.What’s the date today?B栏A.Of course.Here you are.B.It’s September 21st.C.I’m very well,thank you.D.Yes,speaking.E.The same to you.F.Yes,please.I’d like a redG.Thank
21、用to do；do；doing或done填空Youshould make your views (know).Hesuggested (call) a meeting and lettingthe workers (decide) the matterthemselves.Idon’t like to hear you (talk) likethat.Timdecided (put) broken glass on top ofhis wall to prevent boys (climb) overit.Successmeans (work) very,very hard.Iappreciate your wanting (help) myfriend,but it’s time he learnt (practise) (do)his work alone.Try (put) in some more vinegar --- that mightmake it taste a bit b
(27-2x)(21-2x)=27x21x(1-1/4)解一元二次方程应用题. 要有过程的~~求各位高人快点啊......
几道初中一元二次不等式题1.已知二次函数的图像经过与x轴交于点（-1,0）和（2,0）,则该二次函数的解析式可设为?2.二次函数y=-x²+2倍根号3x+1的函数图像与x轴两交点之间的距离为?3.根据以下条件,球二次函数解析式①图像经过（1,-2）（0,-3）（-1,-6）②当x=3时,函数有最小值5,且过点（1,11）③函数图像与x轴交于两点（1-根号2,0）（1+根号2,0）,与y轴交与（0,-2）4,求下列抛物线开口方向,对称周,顶点坐标,最大（小）值及y随x的变化情况①y=x²-2x-3②y=1+6x-x²5.若不等式ax²+8ax+21＜0的解集是｛x|-7＜x＜-1｝,a的值是A1 B2 C3 D46.已知二次函数y=x²+px+q,当y＜0时,-1/2＜x＜1/3,解关于x的不等式qx²+px+1＞07.不等式x²+x+k＞0恒成立,k的取值范围麻烦各位了求答案有详细步骤我额外加高分
英语翻译We verified the Google inside the document which has 2 items corporate cards:3P103,3B107 we have in September 21st and 26 were sent to Atlanta and Geneva.32561,32562,32563,32564,32565,we can't find product code in master data,we has been send to ATL and UN the product code is 36561,36562,36563,36564,36565 and 32705 we have in September 29 were sent to Atlanta and Geneva.Please help to confirm.32991 puzz card we has been send out mockup samples to
解方程 1.x+21=3x/2
解方程． 40%x+16=80 3x+10%x=9.3．

x-0.3x=21解方程

相关推荐