1.
0.55x*0.4=0.22x
0.22x
2.
0.4x0.5=0.2
3.
Q+r>t+s
4.
X 12 28-x
X+12>28-x
2x>16
x>8
40-x>x
20>x
X =>20~8
14^2-6^2=160
Sqrt(160)=12.64
- B
高為12
5.
(2^-2)^3
(2^-3)^2
6.
210*15a/6=525a
7.
X^2-x>0 -1<x<1
X^2>x
若x>0
x>1 ??(不成立)
若x<0
X<1
設0.25=x
A=0.25
設-0.25=x
A>B
8.
N=正或負數
-5 3
Y>=1
Y為分數 =>1/4
9.
80*(1/5)=16
720*(8/10)=576
592/800=74%
10.
Sqrt((1/4)*(1/9))
11.
75 => shipping charge 7.5
82.5 – 25=57.5 =>merchandise和charge
57.5*5/100=2.875
57.5+2.875=60.375
7.5*5/100=0.375
60.375-0.375=60
60*4=240
12.
d-5n=13n-d
2d=18n
D=9n
13.
(10)^4=10000
14.
4000000*(29.1/100)*(1/10)=19400
15.
1.5*(3.3/100)=0.0495 =>1991
4*(5.9/100)=0.236 =>1993
0.236-0.0495=0.1865
16.
設人數100
42.7 * 1/3=14.23
6.3*2/3=4.2
18.43/49=38%
0.1865/0.0496=380%
17.
(2x+5)*2+2*(x+4)+2x=8x+18
18.
P=1 => v=1/2
P=0.5 => v=((0.5)^2+(0.5)^2)/2
V=1/4
19.
(12*x-4)/5=4
12*x-4=20
X=2
8 1 6 1 4
7
20.
125/2=62.5
1~63~125
40~49
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