b \u00bd 52 4 a 530 170 b 107 0699 c 120 145 d no solutions e no solutions f 425

B ½ 52 4 a 530 170 b 107 0699 c 120 145 d no

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b) ½, 5/2 4) a) -5.30, -1.70 b) 1.07, -0.699 c) -1.20, 1.45 d) no solutions e) no solutions f) 4.25, 0.078
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CHAPTER 7 Ex A 1) 5 b 6 2) 6 c 7 3) b 3 c 4 4) -12 n 8 5) 4 n 5 6) 1/3 d 2 7) a 6 8) - d 12 9) 8x 3 10) ¼ y 6 Ex B 1) 3 6 2) 3 x + 1 3) 3 2 x 4) 3 3 x + 7 5) 3 x 1 6) 3 2 x 2 Ex C 1) 2 2) 3 3) 1/3 4) 1/25 5) 1/8 6) 1/7 7) 9 8) 81/16 9) ¼ 10) 0.2 11) 4/9 12) 64 13) 9/4 14) 343 15) ¾ 16) 16/9 17) 8/27 18) 4/25 ExD 19) 6 a 3 20) x 21) xy 2 ExE 22) -3 23) 2 24) 4 25) 8/27 26) 343 27) 4 28) 1/2 29) -2 30) 7 CHAPTER 8 Ex A 1) 2 6 2) 2 3 3) 7 6 4) 3 2 5) 7 2 6) 5 10 Ex B 1) -10 + 3 2 2) 14 3) 6 3 4) 7 + 7 3 5) 5+ 3 3 6) 19 - 9 5 7) 10 + 2 21 8) 4 + 4 2+ 3 + 6 Ex C 1) 3 5 5 2) 1 2 8 3) 6 3 4) 2 5) 3 3 6) 15 5 7) 2 3 2 8) 1 – 3 9) 8 – 4 5 10) 2 + 3 2 7 11) 5 + 3 3 12) = –2 + 5 CHAPTER 9 ExA Correct graphs Ex B 1) gradient 3/2 y-intercept (0, 1) 2) gradient -1/2 y-intercept (0, 4) 3) gradient 2 y-intercept (0, 5/2)Ex C 1) m = 4/3 2) m = -1 3) m = -1 4) m = 3/7 5) m = -5/8 6) m = -3/5 Ex D a)y=−x+3; y=−1/4x+3; y=−3x+3b)y=13x3; y=−6x3; y=−x3c)y=12x1; y=13x+3; y=−4x+2d)y=−x+1; y=x+3; y=12x2e)y=13x1; y=14x+3; y=−3x2f)y=4x2; y=13x+4; y=−6x
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C hapter 10: Practice Entry Test Solutions 1. Expand and simplify a) 4 x 2 + 4 x 3 b) a 2 + 6 + 9 c) 10 x 2 13 x 2. Solve the following equations a) x = 9 b) x = 21 c) h = 5 3. Solve these simultaneous equations a) x = 7 y =− 3 b) x =− 2 y =− 8 c) x = 3 y = 4 4.Factorise 5. Rearrange the following equations to make x the subject a) x = v 2 u 2 2 a b) x = 3 V h c) x = 2 w w 1 6. Solve a Quadratic giving your solution in integer or surd form a) x = 1 2 x =− 3 b) x = 8 ± 40 4 Or x = 2 ± 1 2 10 c) x = 1 ± 21 10 7.Write the following as single powers of x and y and z Simplify : d) x 2 y 2 e) 5 x 3 or 5 3 x f) 6 z 5 8.Write each of the following in the form a+bcwhere a, b and c are Real values 9. Write the gradient and y-intercept of each of these lines a) Gradient 7 / 2 y-intercept (0. -0.75) b) Gradient 3 y-intercept (0, 12) c) Gradient 4 / 5 y-intercept (0, -8/5) Find the gradient of the line which passes through the points d) 8 4 9 1 = 1 2 e) 6 2 3 1 = 2 f) 7 3 5 ( 2 ) = 4 3 = ¿ 4 3
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