Higher Plus
17th June 1978
- 1Vectors Proof Questions3 marks
In a vector proof you find that vector PQ = a - 5b and vector RS = 3a - 15b. What does this show about PQ and RS?
- 2Probability Equation Questions3 marks
The probability of winning a game is 9/10. A player expects 63 wins. How many games did they play?
- 3Histograms3 marks
A histogram has two bars: one 5 units wide with frequency density 1.2, one 25 units wide with density 1.4. How many values in total?
- 4Bounds3 marks
A car covers 820 m (to the nearest 10 m) in 6 s (to the nearest second). Work out the lower bound of its speed, to 2 decimal places.
- 5Algebraic Fractions3 marks
Simplify (x^2 - 3x - 40)/(x - 8).
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