一次函數(shù)的應(yīng)用專(zhuān)項(xiàng)練習(xí)30題有答案

333333.301y

yx

2a①8%10%20%3

152xyx051

4

xm

16001700

…溫yCxy29.24°Word文

….5llyxh12+ll126BA1A1AA712x0.25x+33y=0.5xWord文.80.25

“””30xy9SkmhsOAB_________tWord文.y_________a230ym≤≤2≤x≤6h46m

①0≤≤yx6y

x161.5“““““”鐘xWord文.30012xyyxyx50minymxmmin①≤yxWord文.②

y/x≤xy

2xx40

“

”“”0.40.6x“”yy1yx12況y5yyxWord文.yxABAll12Byhhkm1.20.3x0.5yyx11y2750a含a25%Word文.500xyx166DA81D3BCxABA會(huì)高aa＞0=xx0.9

Word文.

/0.10/0.20/

x

/

37.040.045.0y/cm70.074.878.082.8yxxWord文.Word文.Word文33=30033=300b=.301y=1000

1000

x=20①x20y=kx1

31

20≤x≤=k22k15000≤302221+8%1+10%?20%0.188a=0.2a600a=50000aa

5ll=ky=kx+b1112lyx+2l11223

2x4

x+20×

10

6441

24=100÷÷600E200EF111031.4Word文kkk

501

.0.5a=101=9B56ABy=kx+bkA①y=k27

11

8AA87y=0.5x0.5CDy=0.25x+330=x=13292=40÷0.2510y=0.25x+33Ay=0.5xA20aWord文

21“”xy2212x240y10.25x=0.2x+12x=240yy12240x930÷3=102CD330s=15t15s=1515=15t

.2

x÷50=80t≤50≤≤y=kxx≤2.82.8+502×2=100×4.82.8yx≤≤y=1002x≤2.82.8x≤4.82.8x≤4.860x+100x×260÷302=20÷4=530+5330+5430+5545①00

739z=1101324.55提前0.50.53y=kx+b23004.5代k=300b=2≤x≤14x12x=5×15xy=kx+bxy=2學(xué)10016

x

y=50000+200x

2公

xy

400x50000+200xx250②

251費(fèi)

x=kx+b

17Word文

36002222①≤yxy=kx+b

.b=

2

≤x÷2=1800÷x=60×603600≤≤40yx

yx221y=kx+bx=20

6x≥200x+1200020≤40w12

2y=0ll0.612.40.62.42ly=kx22.4=0.6kk=4則l2x=1.2y=4.81.24.8km案2.4=y0.4x+50=0.6x1

23

x=2500.4x+50120.4x+5012250

=0.3x+30001230022x3x=1800×21800y=kx+bWord文

24

.C0