考滿分4月數(shù)學(xué)系統(tǒng)習(xí)題4有作業(yè)無答案

1

a-b=5,b-c=5,c-3=5a18

2

Thefirsttermofasequenceis1.Startingwiththesecondterm,eachtermis1lessthan3timesthepreviousterm.[QA]Thesmallestnumbergreate...

正確答案：A

3

ab≠0(a+b)^2(a-b)^2

正確答案：D

4

x+y=1xy1

正確答案：B

5

ThedistancebetweenAli’shouseandhercollegeisexactly135miles.Shedrove2/3ofthedistancein135minutes.[QA]Heraveragespeed,inmil...

正確答案：B

6

1＜a＜b＜2aba+b

正確答案：B

7

2/3ofxequals3/4ofx4/5ofx0

8

AtCentralHighSchool50girlsplayintramuralbasketball,40girlsplayintramuralvolleyball,and10girlsplaybothsports.[QA]Theratioofthe...

9

Ifm^2=17,thenwhatisthevalueof(m+1)(m-1)?

10

In2005,80%oftheCentralCitySchoolDistrctstotalexpendiurescamefromlocalpropertytaxes,andtherestcamefromthestategovernment’...

正確答案：B

11

Forhowmanypositiveintegers,x,isttruethatx^3≤3x?

正確答案：B

12

Anantiquedealerboughtachairfor$100andlatersolditfor$1,000.Bywhatpercentdidthevalueofthechairincrease?

正確答案：D

13

Ifx+y=12,then(x+(y/3))+(y+(x/3))=

14

IfAisthepoint(-4,1)andBisthepoint(2,1),whatistheareaofthecirclethathasABasadiameter?

15

BobandJackshareanapartment.IfeachmonthBobpaysadollarsandJackpaysbdollars,whatpercentofthetotalcostdoesBobpay?

正確答案：E

16

Scotthasbbaseballcards.BrianhasonecardmorethanScotthas.AdamhasthreecardsfewerthanScotthas.Intermsofb,howmanycardsdothe...

正確答案：E

17

Ifalinepassesthroughtheoriginandthepoint(3,d),where3<d<6,whichofthefollowingcouldbetheslopeoftheline?Indicateallsuch...

我的答案：A

正確答案：B,CD,E,F

18

If2^a×2^b=2^cand0＜c＜1,thenwhichofthefollowingcouldbetheaverage(arithmeticmean)ofaandb?Indicateallsuchaverages.

我的答案：A

正確答案：A,B,C,D

19

Ifa,b,x,andyarepositiveintegers,and13^a×13^b=(13^x)^y=13^13,whatistheaverage(arithmeticmean)of