Class IX

If F = (9/5)C + 32, then the value of F if the value of C is 30 is
  1. 84
  2. 85
  3. 86
  4. 87
Linear equation in one variable is
  1. 2x = y
  2. y² = 3y + 5
  3. 4x - y = 5
  4. 4x - y = 5
The taxi fare in a city is as follows: For the first kilometer, the fare is Rs.8 and for the subsequent distance it is Rs.5 per kilometer. Taking the distance covered as ‘x’ km and total fare as Rs.y, write a linear equation for this information.
  1. y = 5x – 3
  2. x = 5y – 3
  3. y = 5x + 3
  4. y = 5x + 4
The cost of 2 kg of apples and 1 kg of grapes on a day was found to be Rs.160. A linear equation in two variables to represent the above data is
  1. 2x + y = 160
  2. x + 2y = 160
  3. none of these.
  4. None of these
The geometrical representation of 5x + 7 = 0 as an eqaution in one varibale is
  1. x = 7/2
  2. x = -7/2
  3. x = -2/7
  4. x = -2/7
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