Question

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

Answer 1

4−2x<−3

Explanation:

check:

now --- 4°

after 1 hr --- 2°

after 2 hrs--- 0°

after 3 hrs--- -2°

after 4 hrs--- -4°

so between 3 and 4 hrs it will reach -3°

4-2x < -3

-2x < -7

x > 3 1/2