Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
25th June 2020
- 1Probability Equation Questions3 marks
A bag holds 9 counters, r of them red. Two are taken without replacement and P(both red) = 1/36. Work out r.
- 2Histograms3 marks
On a histogram the bar for 50 < x <= 70 has a frequency density of 3.5. How many values are in that class?
- 3Surds3 marks
Simplify sqrt(8) + sqrt(2), giving your answer in the form a sqrt(b).
- 4Inverse and Composite Functions3 marks
f(x) = 3x - 7 and g(x) = 6x - 9. Work out fg(3).
- 5Velocity Time Graphs2 marks
A train slows steadily from 37 m/s to rest in 5 seconds. Work out its deceleration.
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