Tuesday 25 March 2014

3rd Year Homework 2

Homework 2: To be done neatly in the front of your books for Monday 31st March
TOTAL 28 marks

1. Solve this equation \[\frac{2x+1}{3}-\frac{2(4-3x)}{7}=2\]

[4 marks]

2. A wheelchair ramp of length 10m provides an alternative route to steps which climb 86cm. What angle does the wheelchair ramp make with the ground?

[3 marks]

3. Rob puts £500 in a bank account with interest rate r for 5 years? When he check his balance it is £864.63. What was the interest rate (r)?

[4 marks]

4. By showing your working and not using a calculator, find the value of $ \left( \frac {27}{125} \right)^{-\frac{2}{3}}$

[2 marks]

5. Find the area of a sector of a circle with radius 24cm and angle 35 degrees to 2 significant figures

[3 marks]

6. Find the gradient of this line: $7x-2y=7$ and use this value to find the equation of a line perpendicular to this line which passes through (0,-1)

[4 marks]

7. Solve the simultaneous equations: \[4x+3y=1\\-2x+5y=8\]

[3 marks]

8. HARD: A ship sails 6 km on a bearing of 141 degrees and then 5km on a bearing of 15 degrees. Draw a diagram and work out how far it must travel to return to the starting position. (HINT: one way to do this would be take a look at the Cosine Rule)

[5 marks]

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