Higher Plus
26th January 1990
- 1Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^3. When x = 3, y = 162. Work out y when x = 5.
- 2The Cosine Rule3 marks
A triangle has sides 9 cm, 7 cm and 11 cm. Work out the angle opposite the 9 cm side, to 1 decimal place.
- 3Probability Equation Questions3 marks
A bag holds 7 red and n blue counters. The probability of taking a red is 7/10. Work out n.
- 4Histograms3 marks
On a histogram the bar for 40 < x <= 60 has a frequency density of 1.2. How many values are in that class?
- 5Surds3 marks
Rationalise the denominator of 88/sqrt(11), giving your answer in its simplest form.
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