The weather forecast states that the temperature will be lower than –5°f tonight. let t represent the temperature in degrees fahrenheit. which inequality models this situation?
a. t < –5 and t may be a negative number
b. t < –5 and t must be a positive number
c. t > –5 and t may be a negative number
d. t > –5 and t must be a positive number

I think it is a because it says the temperature is less than -5 degrees Fahrenheit
so you know the sign will have to be t<-5 degrees Fahrenheit now you are left with is t a positive or negative number a positive number would automatically be greater than -5 degrees Fahrenheit so there is no way it can be a positive number thus leaving you with one option.

a