Higher Plus
10th November 1989
- 1Proof of the Circle Theorems2 marks
In a circle theorem proof, a step uses the fact that a tangent meets a radius at the point of contact. State the reason being quoted.
- 2Probability Equation Questions3 marks
A bag holds 7 counters, r of them red. Two are taken without replacement and P(both red) = 1/7. Work out r.
- 3Histograms3 marks
A histogram has two bars: one 10 units wide with frequency density 1.2, one 25 units wide with density 3.5. How many values in total?
- 4Surds3 marks
Rationalise the denominator of 18/sqrt(2), giving your answer in its simplest form.
- 5Quadratic Inequalities3 marks
Solve x^2 + 2x < 0.
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