Daily Practice - Higher Plus
20th November 1992
- 1Histograms2 marks
On a histogram, a 10-wide bar and a 40-wide bar have the same frequency density of 2. How many more values are in the wider class?
- 2Surds3 marks
Rationalise the denominator of 12/sqrt(2), giving your answer in its simplest form.
- 3Algebraic Fractions3 marks
Simplify (x^2 - 4x - 21)/(x - 7).
- 4Velocity Time Graphs3 marks
A tram runs at 9 m/s for 30 s, then slows steadily to rest over 10 s. Work out its average speed for the whole journey, to 2 decimal places.
- 5Vectors Proof Questions3 marks
In a vector proof you find that vector PQ = 6a - b and vector RS = 12a - 2b. What does this show about PQ and RS?
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