AnSWErS to tHE StudEnt'S Book ExErCiSES - Hodder Plus Home

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2 Description to include:• A winning, B second, C third• A ran at a steady speed, B started off quicklybut gradually slowed down, C ran in a seriesof sprints and rests.May also mention approximately whenovertaking took place.3 a) £2b) 80pc)30010 20 30 40 50Distance (km)d) £24e) 69p (to nearest penny)4 a) D b) Hc) F d) C5 a) £49.50b) £46.50c)606 a)Charge (£)Cost (£)Charge (£)25201510550403020100d)1 2 3 4 5 6 7 8 9 10 11 12Number of boxes180170160150140130 b)120110100908070605040302010020 60 100 14040 80 120 160Water used (cubic metres)b) Less than 91 cubic metresExercise 14.4 (page 192)Answers read from graphs may be approximate.1 a) x 23 22 21 0 1 2 3b)x 2 9 4 1 0 1 4 922 22 22 22 22 22 22 22y 5 x 2 2 2 7 2 21 22 21 2 7y x 2 2876543213 2 1 011 2 3234c) (i) 3.3(ii) 2.4 to 2.5 or 22.4 to 22.52 a) x 21 0 1 2 3 4 5x 2 1 0 1 4 9 16 2524x 4 0 24 28 212 216 220y 5 x 2 2 4x 5 0 23 24 23 0 5b)y5 y x 2 4x43211 011 2 3 4 5 x2345c) (i) 0.8 to 0.9 (ii) 0.6 or 3.43 a) x 24 23 22 21 0 1 2 3b)x 2 16 9 4 1 0 1 4 9x 24 23 22 21 0 1 2 323 23 23 23 23 23 23 23 23y 5 x 2 1 x 2 3 9 3 21 23 23 21 3 9y987654321y x 2 x 34 3 2 1 011 2 3 x234c) (i) 21.8 (ii) 22.3 or 1.3204Answers to the Student’s Book exercisesHigher WJEC GCSE Mathematics © 2010, Hodder Education
4 a) x 22 21 0 1 2 3 4 5x 2 4 1 0 1 4 9 16 2523x 6 3 0 23 26 29 212 2154 4 4 4 4 4 4 4 4y 5 x 2 2 3x 1 4 14 8 4 2 2 4 8 14b) y1413121110987654321y x 2 3x 42 1 0 1 2 3 4 5 xc) (i) 1.75 (ii) 21.4 or 4.45 a) x 22 21 0 1 2 3 4 53x 26 23 0 3 6 9 12 152x 2 24 21 0 21 24 29 216 225y 5 3x 2 x 2 210 24 0 2 2 0 24 210b) y3212 1 011 2 3 4 5 x2345678y 3x x 2910c) (i) 2.25 (ii) 20.5 to 20.6 or 3.5 to 3.66 a) x 23 22 21 0 1 2 3 4b)x 2 9 4 1 0 1 4 9 162x 3 2 1 0 21 22 23 2425 25 25 25 25 25 25 25 25y 5 x 2 2 x 2 5 7 1 23 25 25 23 1 7y x 2 x 5 y76543213 2 1 011 2 3 4 x23456c) (i) 21.8 or 2.8 (ii) 22.4 or 3.47 a) x 23 22 21 0 1 2 3b)2x 2 18 8 2 0 2 8 1825 25 25 25 25 25 25 25y 5 2x 2 2 5 13 3 23 25 23 3 13y 2x 2 5y131211109876543213 2 1 011 2 3 x23456c) (i) 21.6 or 1.6 (ii) 22.7 or 2.78 a) x 0 1 2 3 4 5b)A 5 6x 2 0 6 24 54 96 150A16014012010080604020A 6x 201 2 3 4 5 xc) (i) 1.8 (ii) 3.6 to 3.7Mixed exercise 14 (page 195)17654321y101 2 3 4123y 2x 1xHigher WJEC GCSE Mathematics © 2010, Hodder EducationAnswers to the Student’s Book exercises 205
Page 1 and 2: AnSWErS to tHE StudEnt’SBook ExEr
Page 3 and 4: Chapter 3Exercise 3.1 (page 47)1 a)
Page 5 and 6: Chapter 5Exercise 5.1 (page 73)1 5
Page 7 and 8: 4 a) 0.722 b) 1.26 c) 20.6495 a) 33
Page 9 and 10: Chapter 11Exercise 11.1 (page 144)x
Page 11: 2345y 3y4321R3 2 1 0 1 2 3 41y 2x
Page 15 and 16: 10 a)x 22 21 0 1 2 3 4x 2 4 1 0 1 4
Page 17 and 18: 3 The velocity increases from 0 m/s
Page 19 and 20: 7 a)y302826242220181614121086420y
Page 21 and 22: 5 a) y 5 ___ 24xb) 486 a) d 5 ____
Page 23 and 24: Chapter 21Exercise 21.1 (page 283)1
Page 25 and 26: (x 2 np)2k) q 5 _________ l) x 5 6
Page 27 and 28: Mixed exercise 25 (page 328)1 a)c)2
Page 29 and 30: Exercise 27.5 (page 362)1 a) (5, 3,
Page 31 and 32: 6 a) A reflection in the line y 5 0
Page 33 and 34: 3 Scale 1 cm 5 10 mHedge2 Scale 1 c
Page 35 and 36: 7 163.4 cm (1 d.p.)8 14.8 cm (1 d.p
Page 37 and 38: Chapter 32All answers are given cor
Page 39 and 40: 6yd) (i)y1y cos 3 θ20130° 60° 9
Page 41 and 42: 2 a) (1, 8)b) 233 y1210CD8 A B64D C
Page 43 and 44: 6 A7DCEBAD 5 AB, DE 5 DB and AE is
Page 45 and 46: 4 a)Mark50403020100400 500 600Circu
Page 47 and 48: Exercise 42.2 (page 568)1 a)First d
Page 49 and 50: 7 a)First discSecond discOutcomePro
Page 51 and 52: 2 a) You are aged 19 up until your
Page 53: 15 23 (because 0 is in the sequence

AnSWErS to tHE StudEnt'S Book ExErCiSES - Hodder Plus Home

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