Higher Plus
12th September 1975
- 1Direct and Inverse Proportion Depth3 marks
y is directly proportional to sqrt(x). When x = 4, y = 12. Work out y when x = 64.
- 2The Cosine Rule3 marks
A triangle has sides 11 cm, 15 cm and 12 cm. Work out the angle opposite the 11 cm side, to 1 decimal place.
- 3Probability Equation Questions3 marks
A bag holds 5 red and n blue counters. The probability of taking a red is 1/2. Work out n.
- 4Histograms3 marks
A histogram has four 10-wide classes from 0, with frequency densities 1, 3, 2, 0.5. Which class contains the median?
- 5Surds3 marks
Rationalise the denominator of 110/sqrt(11), giving your answer in its simplest form.
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