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

4-2x≤-3 so basically you are trying to find x so the best inequality for this equation would be less than or equal to hoped this helped have a great day :)

Answer 2

4 - 2x < 3

Explanation:

Given,

The measured temperature in Toronto = 4°C,

∵ the temperature started dropping 2°C every hour,

So, the decrement in temperature after x hours = 2x degree celsius,

∴ The total temperature after x hours = original temperature - decrement in the temperature,

= 4 - 2x

According to the question,

Total temperature would be below -3°C,

4 - 2x < 3

Which is the required inequality.