SAT数学练习12文档格式.docx
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SAT数学练习12文档格式.docx
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f(x)=4?
6.Considerthegraphsoffunction
shownabove.Whichofthefollowingbestapproximatesthevalueof
(g∘f)(3)?
A.-16.8
B.-2.8
C.5
D.9.9
7.Considerthegraphsoffunction
shownabove.Whatisthevalueofg(f
(2))?
8.Thegraphoffunction
canbeshifted
4
tothelefttoobtainthegraphoffunction
g.Iff(x)=
,whichofthefollowingisequivalenttofunction
g?
A.g(x)=
-4
B.g(x)=
+4
C.g(x)=
D.g(x)=
9.
Considertheequationshownabove,where
Q
and
P
arefunctions.If(x0,y0)
isapointonthegraphy=Q(x),whichofthefollowingisapointonthegraphofy=P(x)?
A.(x0,y0)
B.(2x0,y0/2)
C.(x0/2,2y0)
D.(2x0,2y0)
10.Thegraphsy=t(x)
andy=u(x)
aregraphedinthe
xy-planeabove.Whichofthefollowingcouldbetrue?
A.u(x)=−t(2x)
B.u(x)=−t(−2x)
C.u(x)=−t(x/2)
D.u(x)=−t(−x/2)
Thegraphsofy=j(x)
andy=k(x)
areshownabove.Whichofthefollowinggraphsisthegraphofy=j(k(x))?
12.Leth(x)=(x+2)/(x-5)
.Whichofthefollowingisequivalenttoh(h(x))?
A.
B.
C.
D.
13.
Playingtennis
Playingsquash
Energyexpenditurerate
1,594
2,726
Oxygenconsumptionrate
77
130
Fatburningrate
49
r
Thetableabovelistsaverageexpenditureratesofplayingtennisvs.playingsquashbasedonabodyweightof
55
kilograms.Theratioofeachvalueinthetenniscolumntothecorrespondingvalueinthesquashcolumnisaboutthesamethroughoutthetable.Whichofthefollowingisclosesttothefatburningrate
r
ofsquash?
A.27
B.29
C.83
D.85
14.Lea’scartravelsanaverageof
30
milespergallonofgas.Ifshespent
$20.70
ongasfora172.5
miletrip,whatwastheapproximatecostofgasindollarspergallon?
A.$1.45
pergallon
B.$3.40
C.$3.60
D.$5.75
15.KavithaandAndreiaretruckdriversfortheDelightfulDeliveryCompany,whichservicescitiesW,
T,and
Q.
Thedistancefromcity
W
tocity
T
is
48.5
miles.
20
36
IfKavitha'
struckandAndrei'
strucktravelatthesamespeed,andittakesAndrei
91
minutestogofromcity
T,abouthowmuchtimewillittakeKavithatotravelfromcity
tocityQ?
A.19minutes
B.38minutes
C.68minutes
D.123minutes
16.Yaseminisusingasugarcookierecipewithaflourtosugarratioof
11:
6.Tomakeonebatchofcookies,2.75
cupsofflourareneeded.IfYaseminwouldliketotripletherecipe,whichofthefollowingbestapproximateshowmuchsugarshewillneed?
A.1.5cups
B.4.5cups
C.5cups
D.15cups
17.Acertainhighschoolgeometryclassismadeupoffreshmenandsophomores.Theratiooffreshmentosophomoresinthatclassis
3:
4.Ifthereare
12
sophomoresintheclass,whatisthetotalnumberofstudentsintheclass?
A.9
B.16
C.21
D.28
18.Themusicalintervalbetweentwosoundsiscalledan"
octave"
iftheratioofthesounds'
frequenciesis
2:
1.Thefollowingtableshowsthenamesofthemusicalintervalsbetweentwosoundsbasedontheratiosofthetwosounds'
frequencies.
Nameofthemusicalinterval
Ratiooftwosoundfrequencies
Majorthird
4:
5
Perfectfourth
4
Perfectfifth
3
Majorsixth
Ifasoundisplayedwithafrequencyof
480
Hz,andasecondsoundisplayedwithafrequencyof
800
Hz,whatisthenameofthemusicalintervalbetweenthetwosounds?
A.Majorthird
B.Perfectfourth
C.Perfectfifth
D.Majorsixth
19.The"
maximumoccupancy"
ofaroomisthetotalnumberofpeoplewhocanbeinaroomwithoutcausingafirehazard.Inalargeroom,aFireSafetyCodestatesthatthemaximumoccupancyis
1
personforevery
7
squarefeet(
).Acollegeishostingaconcertinahallthatis
14,721
,and
1,000
peopleareexpectedtoattend.AccordingtotheFireSafetyCode,approximatelyhowmanymorepeoplecanattendtheconcertwithoutcausingafirehazard?
A.900
people
B.1,000
C.1,100
D.2,100
20.Adonutcompanymakescream-filleddonutsusing
cup(c)
ofdoughand
tablespoon(tbsp)ofcreamperdonut.Thecompanydecidestochangetheirrecipetouse
3
timestheamountofcreamfortheir"
NewTriple-StuffedDonuts!
"
Ifthedonutcompany'
snewrecipeusesthesameamountofdoughperdonut,whatistheratioofdoughtocreamneededtomake
triple-stuffeddonuts?
A.1
c:
tbsp
B.1
6
C.2
D.1
2
21.Amarineaquariumhasasmalltankandalargetank,eachcontainingonlyredandbluefish.Ineachtank,theratioofredfishtobluefishis
to
4.Theratiooffishinthelargetanktofishinthesmalltankis
46
5.Whatistheratioofbluefishinthesmalltanktoredfishinthelargetank?
A.15:
184
B.10:
69
C.69:
10
D.184:
15
22.Twoleadingbrandsofpapertowelsareonsale.BrandAhas
rolls,eachwith
56
sheets,for$4.29.BrandBhas
8
48
sheets,for
$5.99.Whichofthefollowingbestdescribestherelationshipbetweenthecostpersheetofthetwobrands?
A.Thetwobrandscostthesameamountpersheet.
B.BrandBcosts
$0.003
morepersheetthanBrandA.
C.BrandAcosts
morepersheetthanBrandB.
D.BrandBcosts
$0.03
morethanBrandA.
23.ZhangLeispent
$20.00
duringhislastoutingatthebowlingalley.Thisincludedaonetimeshoerentalfeeof
$3.50.Hespenttherestofthemoneyonbowlinganumberofgames.IfittookZhangLei
45
minutestobowleachgameandhespent
hoursand
minutesbowling,howmuchdiditcostpergame?
A.$3.00
B.$5.50
C.$6.67
D.$7.34
24.Mr.Bumbledeliversnewspaperstohiscommunityeveryweek.Hisroutetakes
hourstocomplete.Duringthefirst
weeksofdeliveringnewspapers,hetraveledatotalof
100
blocks.Mr.Bumbledeliversnewspapersfor
50
weekseachyear.HowmanyblocksdoesMr.Bumbletraveldeliveringnewspapersin
year?
block
B.4
blocks
C.50
D.2,500
blocks
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