Higher
4th October 1979
- 1SOHCAHTOA (Trigonometry)3 marks
A right-angled triangle has sides 9 cm, 40 cm and 41 cm. Work out the angle opposite the 9 cm side, to 1 decimal place.
- 2Probability Trees3 marks
A bag holds 4 red and 3 blue counters. Two are taken without replacement. Work out the probability both are red.
- 3Histograms2 marks
A histogram class is 10 units wide and contains 25 values. Work out the frequency density.
- 4Surds2 marks
Write sqrt(32) in the form a sqrt(b), where b is as small as possible.
- 5Parallel and Perpendicular Lines3 marks
Work out the equation of the line parallel to y = -2x + 7 that passes through (6, -4).
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