Higher Plus
11th June 1959
- 1Histograms2 marks
On a histogram, a 10-wide bar and a 20-wide bar have the same frequency density of 2. How many more values are in the wider class?
- 2Surds3 marks
Simplify sqrt(80) + sqrt(245), giving your answer in the form a sqrt(b).
- 3Factorising Harder Quadratics3 marks
Solve 2x^2 + 5x - 3 = 0.
- 4Velocity Time Graphs3 marks
A tram runs at 12 m/s for 30 s, then slows steadily to rest over 6 s. Work out its average speed for the whole journey, to 2 decimal places.
- 5Proof of the Circle Theorems2 marks
In a circle theorem proof, a step uses the fact that a triangle is drawn from the ends of a diameter to a point on the circle. State the reason being quoted.
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