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Prelim Revision 12

Prelim Revision 12. wuq4. y. Equation?. 1. (-2, 0). x. (0, -6). 2. Senga buys a caravan for £8000. One year later its value is £6200. Calculate the percentage depreciation. 3. Solve Graphically: 2x + 3y = 12 2x – y = 4. 4. Volume?. 8cm. 5cm. 4cm. 9cm. y.

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Prelim Revision 12

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  1. Prelim Revision 12 wuq4

  2. y Equation? 1. (-2, 0) x (0, -6)

  3. 2. Senga buys a caravan for £8000. One year later its value is £6200. Calculate the percentage depreciation.

  4. 3. Solve Graphically: 2x + 3y = 12 2x – y = 4

  5. 4. Volume? 8cm 5cm 4cm 9cm

  6. y Equation? 1. (-2, 0) x (0, -6) m = 0 – (-6) = 6 c = -6 = -3 -2 -2 – 0 y = -3x – 6

  7. 2. Senga buys a caravan for £8000. One year later its value is £6200. Calculate the percentage depreciation. Depreciation = 8000 – 6200 = £1800 % Depreciation = 1800 = 0.225 = 22.5% 8000

  8. 3. Solve Graphically: 2x + 3y = 12 2x – y = 4 2x + 3y = 12 x = 0 y = 0 (0 , 4) y = 4 (6 , 0) x = 6

  9. 2x + 3y = 12 Y 4 3 2 1 (0, 4) -5 -4 -3 -2 -1 1 2 3 4 5 X (6 , 0) -1 -2 -3 -4

  10. 2x – y = 4 x = 0 y = 0 y = -4 (0 , -4) x = 2 (2 , 0)

  11. Y 4 3 2 1 Point of intersection 2x + 3y = 12 -5 -4 -3 -2 -1 1 2 3 4 5 X -1 -2 -3 -4 2x – y = 4 Solution x = 3, y = 2

  12. 4. Volume? 3cm 8cm Area of Face 5cm Area Rectangle = 5 x 9 = 45cm2 4cm 9cm Area Triangle = ½ X 9 X 3 = 13.5cm2 Vol. = 58.5 X 4 = 234cm3 Total Face Area = 45 + 13.5 = 58.5cm2

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