The inequality you can use to determine whether you should sign up is:
[tex]3(x-25)<100[/tex]
It is given that:
The regular monthly fee i.e. x is discounted by $ 25.
This means that now the monthly fee would be:
$ (x-25)
The membership is offered for three months.
This means that the cost for three months will be: $ 3(x-25)
Also,
The total cost of the trial membership must be less than $100.
i.e. the inequality which satisfies the above condition is given by:
[tex]3(x-25)<100[/tex]
