Higher Plus
24th October 1958
- 1Proof of the Circle Theorems2 marks
In a circle theorem proof, a step uses the fact that opposite angles of a cyclic quadrilateral are being proved. State the reason being quoted.
- 2Probability Equation Questions3 marks
A bag holds 8 counters, r of them red. Two are taken without replacement and P(both red) = 3/28. Work out r.
- 3Histograms3 marks
A histogram has two bars: one 20 units wide with frequency density 2, one 5 units wide with density 0.8. How many values in total?
- 4Surds3 marks
Rationalise the denominator of 24/sqrt(2), giving your answer in its simplest form.
- 5Inverse and Composite Functions3 marks
f(x) = 4x - 8 and g(x) = 6x + 6. Work out fg(3).
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