Higher Plus
14th February 1986
- 1Surds3 marks
Rationalise the denominator of 8/sqrt(2), giving your answer in its simplest form.
- 2Completing the Square3 marks
Work out the coordinates of the turning point of y = x^2 + 16x + 2.
- 3Direct and Inverse Proportion Depth3 marks
y is directly proportional to sqrt(x). When x = 4, y = 4. Work out y when x = 81.
- 4Finding the Area of Any Triangle3 marks
A triangle has sides of 11 cm and 16 cm and an area of 62.23 cm^2. Work out the acute angle between those two sides, to the nearest degree.
- 5Probability Equation Questions3 marks
A bag holds 10 counters, r of them red. Two are taken without replacement and P(both red) = 1/45. Work out r.
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