3x = 24 = 8 x 28) (a) 2 (b) = 5s 1 2 r – (c) 79 = 5s 1 80 = 5s 16 2 s = – 29) c2 = a2 + b2 c2 = 1202 + 402 c2 = 14400 + 1600 c2 = 16000 c = c = 126.5cm 4 30) (a) 2 (b) = 5s + 1 2 c (c) 116 = 5s 1 115 = 5s 23 2 + s = 31) Mean = 79.76 / 8 = 9.97 seconds The 2nd was better than the 1st by 0.01seconds 4 32) 4 33) (a) Complete the table below. 2 (b) = 2D + 1 2 L (c) 77 = 2D + 1 76 = 2D 38 2 D = 34) c2 = a2 + b2 342 = x2 + 202 1156 = x2 + 400 x2 = 1156 400 = 756 – x = √756 x = 27.5m 4 35) T = D / S 3
3x = 24 x = 8 28) (a) (b) r = 5s – 1 (c) 79 = 5s – 1 80 = 5s s = 16 2 2 2 29) c2 = a2 + b2 c2 = 1202 + 402 c2 = 14400 + 1600 c2 = 16000 c = c = 126.5cm 4 30) (a) (b) c = 5s + 1 (c) 116 = 5s + 1 115 = 5s s = 23 2 2 2 31) Mean = 79.76 / 8 = 9.97 seconds The 2nd was better than the 1st by 0.01seconds 4 32) 4 33) (a) Complete the table below. (b) L = 2D + 1 (c) 77 = 2D + 1 76 = 2D D = 38 2 2 2 34) c2 = a2 + b2 342 = x2 + 202 1156 = x2 + 400 x2 = 1156 – 400 = 756 x = √756 x = 27.5m 4 35) T = D / S 3
n4-av-revision-booklet-answers.docx