x=8是方程9×3-1.7=()的解

x=8是方程9×3-1.7=()的解


不是



英語排片語句題
1.he,teaching,by,last,in,for,college,October,years,had,the,thirty,been,year.
2.how,it,did,to,much,cost,build,bridge,a.
3.the,was,to,boy,made,write,again,it.


1.he had been teaching in the college for thirty years by last October.
2.how much did it cost to build a bridge?
3.the boy was made to write it again.



分數16/9的分子加上一個數,而分母同時减去這個數後,所得的新生數化簡後為3/2,這個數是多少不要方程


分母减去一個數後約分為3,則需减去1,4,7,10,13這幾種可能.
此時分母為15,12,9,6,3.
而分子也加上相同的數,
為:10,13,16,19,22
其中只有10/15=2/3,囙此這個數是1.



They are not______the same class,but they are______the same school.
A.on;in B.in;in C.in;at D.at;in


B



(-4a^6-20a^4b^2-12a^3b+6a^3b^2)/[-(-2a)^3]


(-4a^6-20a^4b^2-12a^3b+6a^3b^2)/[-(-2a)^3]
=(-4a^6-20a^4b^2-12a^3b+6a^3b^2)/(8a^3)
=-1/2a³;-5/2ab²;-3/2b+3/4b²;



常用英語片語(動詞)
越多越好


英語動詞片語整理;break break away from擺脫,從…脫離break in adv.闖入打斷break into prep.闖入突然…起來= burst into break off中斷;折斷break out爆發(無被動)break through突破(日…



G為三角形ABC的重心,其中AG為3釐米,BG為4釐米,CG為5釐米,求三角形ABC的面積.請老師幫忙解題,


因為三角形的中線把三角形分成面積相等的兩部分,本題中易證AG、BG和CG把△ABC分成面積相等的三部分.記BC的中點為D,熟知中線AD的兩段AG=2GD.延長GD到H,並使DH=GD,連接HB,則△DBH≌△GDC,HB= CG=5,△GBH與△GBC面積相等…



I'd like a glass of milk and an egg.改為複數形式
如題填空:____like____of____and____.
還有一個:We take(forty)books to the classroom.對加括弧的部分提問,填空:____ ____books____take____to the classroom?
快啊快啊十分鐘之內!急!


I'd like glasses of milk and eggs.
How many books do we take to the classroom?
第二個問題貌似空格畫錯位置了.



在△ABC中,a:b:c=2:5:6,則sinA:sinB:sinC等於()
A. 2:5:6B. 6:5:2C. 6:2:5D.不確定


∵根據正弦定理得asinA=bsinB=csinC,∴sin ;A:sin ;B:sin ;C=a:b:c=2:5:6,故選:A



英語連詞成句:did,lucy,is,do,last,what,weekend,father


Lucy do what is father did last weekend.