Higher Plus
12th January 1990
- 1Surds3 marks
Rationalise the denominator of 48/sqrt(6), giving your answer in its simplest form.
- 2Completing the Square3 marks
Work out the coordinates of the turning point of y = x^2 - 8x + 1.
- 3Direct and Inverse Proportion Depth3 marks
y is inversely proportional to x^2. When x = 3, y = 75. Work out y when x = 5.
- 4The Sine Rule3 marks
In triangle ABC, angle A is 72°, side a is 20 cm and side b is 17 cm. Work out the acute angle B, to 1 decimal place.
- 5Conditional Probability3 marks
A bag holds 3 red and 5 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?
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