Question

The temperature in Toronto at noon during a winter day measured 4°C. The temperature started dropping 2° every hour. Which inequality can be used to find the number of hours, x, after which the temperature will measure below -3°C?

Answer 1

-3> 4-2x If u a have to have the °C then it would be, -3°C>4°c-2°x

Answer 2

4° - 2x < (-3°) will be the inequality.

Explanation:

Temperature in Toronto at noon was measured = 4° C

The temperature started dropping by 2° C in every hour.

If the number of hours to fall the temperature is = x

then temperature fall in x hours will be = 2x

Temperature of Toronto after x hours = 4° - 2x

the temperature below -3°C will be represented by the inequality

4° - 2x < (-3°)

With the help of this inequality we can find the value of x.