S Rey

Most popular questions and responses by S Rey
  1. Math

    Choose the three true statements about the graph of the quadratic function y = x2 − 3x − 4. Options A) The graph is a parabola with a minimum point. B) The graph is a parabola with a maximum point. C) The point (2, 2) lies on the graph. D) The point

    asked on June 5, 2010
  2. Mathamatics

    This question concerns the straight line that passes through the points (−1, 3) and (2, −6). Choose the three true statements from the following. Options A) The gradient of the line is 3. B) The gradient of the line is −3. C) The gradient of the line

    asked on June 6, 2010
  3. Math

    This question concerns the straight line that passes through the points (−1, 3) and (2, −6). Choose the three true statements from the following. Options A The gradient of the line is 3. B The gradient of the line is −3. C The gradient of the line is

    asked on June 5, 2010
  4. Math

    Choose the three true statements from the following. Options A) The period of y =cosx is 90◦. B )The period of y =sinx is ð radians. C) The period of y =sin(2x) is four times the period of y =sinx. D) The period of y =sin(2x) is half of the period of y

    asked on June 5, 2010
  5. Mathamatics

    The distance d in kilometres to the horizon can be estimated using the formula d = root13h,where h is the height above ground level, in metres, of the observer. (a) Use the formula to find the distance to the horizon for an observer on the London Eye, 135m

    asked on June 4, 2010
  6. Mathamatics

    Choose the two true statements from the following. Options A) If the rate of inflation as measured by the RPI is 2%, then a pension index linked to the RPI will increase by 2%. B) A price ratio of 0.8 corresponds to a price decrease of 80%. C) If the price

    asked on June 4, 2010
  7. Mathamatics

    The distanceãd in kilometres to the horizon can be estimated using the formula d = 13h,where h is the height above ground level, in metres, of the observer. (a) Use the formula to find the distance to the horizon for an observer on the London Eye, 135m

    asked on June 4, 2010
  8. Mathamatics

    A conference centre charges £120 to hire a room, with an additional charge of £8 for each delegate. (a) Find the total cost (including room hire) of a conference with 30 delegates. (b) Write down a formula for the total cost, C,in £,ofhiring a room for

    asked on June 4, 2010
  9. Mathamatics

    A walk up a hill starts at a car park on the 100m contour and climbs steadily to a summit at 240 m. On a map with scale 1:25 000 the distance along the path from the car park to the summit is 9.6 cm. Choose the three true statements from the following.

    asked on June 4, 2010