Apps. and Interpretation for IBDP Maths Ebook 1 | страница 374

Your Practice Set – Applications and Interpretation for IBDP Mathematics
32.2 (a)
1
2
(b) x� 2y� 60 � 0
(c)
1
y� x�
15
2
(d) y� �2x�
20
(e) ( � 14, 8)
(f) 80
32.3 (a) a � 40
(b) 4x�3y�120 � 0
(c)
3 45
y� x�
4 2
(d) c � 18
(e) CE � 45
(f) 675
32.4 (a)
1
�
2
(b) p � 20 , q �� 10
(c)
1
y �� x
2
(d) 2x�y�
0
(e) OC � 125
(f) (5,10)
Chapter 11
Exercise 33
33.1 (a) (0,15)
(b) 0
(c) y � 15
(d) The distance between A and
D is equal to the distance
between B and D
33.2 (a) (i) (100, 0)
(ii) (0, 50)
(iii) (50, 25)
(b) 2
(c) y�2x�
75
33.3 (a) (i)
3
4
(ii)
3
y� x�
15
4
(b) (24, 3)
(c) (36,12)
33.4 (a) (i)
4
3
(ii)
4
y� x�
20
3
(b)
4
20
3 b �
34.1 (a)
(c) (i) 25
(ii) b � 18
Exercise 34
2
27.5 km
(b) (i)
1
2
(ii)
1 9
y� x�
2 2
(c) So Yeon’s home is on the
boundary separating the
Voronoi cells of the
restaurant B and the
restaurant C , which is
equidistant to them
34.2 (a) (i) 3
(ii) y�3x�
8
(b) The police station B
(c) 5 �x
� 10
34.3 (a) (i) 2.01
(ii) 2.15
(iii) 1.85
(b) The school C
34.4 (a) (5, 5)
(b) 2.5 �x
� 5
(c) Refer to solution
364
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