It’s about the three little pigs math problem zoom in if you have to

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

In the diagram, gef and hef are congruent. what is the value of x