math

posted by .

At 9:00 pm the outside temperature was 20 celcius, by midnight the temperature had dropped x degrees.
Which of the following represents the midnight temperature?

20 + x
20-x
20
20x

  • math -

    20-x, because it DROPPED x degrees.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. algebra1

    at midnight, the temperature was-12degrees F. by noon, the temperature had risen 25degrees F. durinh afternoon, it fell to 10degrees f ANOTHER 3 degrees f by midnight. what was the temperature at midnight?
  2. Temperature(Math)

    At 5 o'clock in the morning, the temperature at the top of the race course was -13o. By 10:00 A.M., it was +12o. How much had the temperature risen?
  3. precalculus

    Outside temperature over a day can be modelled as a sinusoidal function. Suppose you know the temperature is 80 degrees at midnight and the high and low temperature during the day are 90 and 70 degrees, respectively. Assuming t is …
  4. math

    The temperature in your house is controlled by a thermostat. The temperatures will vary according to the sinusoidal function:f(x)=6sin(pi/12(x-11)+19, where f(x) represents the temperature in degrees Celsius (°C) and x is hours since …
  5. Precalculus ????

    The temperature in your house is controlled by a thermostat. The temperatures will vary according to the sinusoidal function: f(x)=5sin(pi/12)*(x-11)+19 where f(x) represents the temperature in degrees Celsius (°C) and x is hours …
  6. Precalculus- HELP!

    The temperature in your house is controlled by a thermostat. The temperatures will vary according to the sinusoidal function: f(x)=7sin(π/12(x-11))+33 where f(x) represents the temperature in degrees Celsius (°C) and x is hours …
  7. maths

    The temperature in a town was 24 degrees at midday. The temperature rose by 5 degrees to reach a maximum at 2pm and the dropped 17 degrees before midnight. what was the temperature at midnight?
  8. Math

    Between midnight and 6:00am, the temperature dropped 10 degrees F. Between 6 am and 12:00; the temperature rose 18 degrees F.What was the change in the temperature from midnight to noon. I can't seem to get the formula for this problem
  9. Math

    The temperature outside marys school is 17°c at midday by midnight the temperature has fallen by 33 °c what is the temperature at midnight
  10. Math

    from midnight to 6:00 am, the temperature rose 8 degrees C. At 6:00 am the temperature was -20 degrees C. What was the temperature at midnight?

More Similar Questions