Daily Practice · Higher Plus

Daily Practice - Higher Plus

16th February 1993

5 questions · 14 marks · Grades 8-9 · 51 question types in this band

1
Perpendicular Lines and the equation of a tangent3 marks
The point (8, 15) lies on the circle x^2 + y^2 = 289. Work out the gradient of the tangent to the circle at that point.
2
Conditional Probability3 marks
A bag holds 6 red, 6 blue and 6 green counters. Two are taken without replacement. Given neither is green, what is the probability both are red?
3
Histograms2 marks
On a histogram, a 4-wide bar and a 12-wide bar have the same frequency density of 1.5. How many more values are in the wider class?
4
Surds3 marks
Expand and simplify (9 + sqrt(11))(9 - sqrt(11)).
5
Transforming Graphs y=f(x)3 marks
The point (0, 1) lies on y = f(x). Write down its image on y = f(x - 1).

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