First, multiple choice questions
1.A
2.B
3.C
4.B
5.D
6.B
7.C
8.
A
Second, fill in the blanks
9.9.
10.X≥ 1
1 1.
1.026× 105
km2. 12
2,4
13.
9 100 = 7800(X+ 1)2. 14。
1
. 15.
& lt
16.
250
. 17.
1.5∏. 18.
16
.
Third, answer questions.
19. Calculation:
( 1)
three
(2).
=(a+ 1)
/
(a- 1)
20.
(1) omitted;
(2) If there are 60 ninth-grade students in this city.
000 students took part in the test, trying to estimate the number of students who passed the test in the city.
60000× (1-176/2000) = 54720 people.
2 1.3/8
22. Question: How many hours did Party A and Party B walk?
Solution: a takes x hours and b takes y hours.
X+Y=2.2
2*60X= 100Y
23.( 1)AD=BC/3
(2) Because AF = DC, AB = Germany and AF = Germany.
24.( 1)
A
( 1,-2)
C(2，0)
(2)Y=
-
2X2
+
4X
25.
(1)3 km
(2)40.56 km/h
26. (The full mark of this question is 10)
(1) Agree, congruent (omitted)
(2)
=22.50
27. (The full mark of this question is 12)
( 1)AB
Y= 1.5X-2
(4≤X≤5)
B.C.
Y=X+0.5
(5≤X≤ 10)
(2)
The AB line segment has the largest profit.
28.( 1)C(5-t，0)
P(3-3t/5，4t/5)
(2)
①
At the beginning and end of intersection D, when the circle is tangent to DE, make it perpendicular to DE.
EOD in triangle is very similar to OFD in triangle: OF/OE=CD/ED.
Get CD= 10/3, so MC = 16/3, that is, t= 16/3.
4/3≤
t
≤ 16/3
②
Calculate AB = APAP = BPBP=AB respectively.
Get: t=4/3, 20/3, 4, 5
Four solutions