Wednesday 5 November 2014

4th Year Extension Test Practice

Revision - 21 marks

1. A car depreciates (decreases) by 15% of its value every year. After how many years does a car bought for £13000 depreicate to less then £1000?

[3 marks]


2. Make $x$ the subject:
  1. $y=\sqrt{5-3x^2}$
  2. $y=\dfrac{2x^2+3}{2x^2-1}$

[6 marks]


3. A slug is climbing a wall. On an "upper" day he climbs upward 3m. On a "dozy" day he slides 2m downward. If after 30 days the slug is 55m up the wall, how many "upper" days did he have?

[4 marks]


4. Find the equation of a line which is parallel to the line $2y-3x=5$ but goes through the point (2,-4). Give your answer in the form $ay+bx=c$

[4 marks]


5. Shade regions

[4 marks]


Additional topics include: Sets, ratio, percentages

Link to the answers

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