Answer:
tex]60+30n<150[/tex]
Explanation:
Given :
Nala can spend no more than $150 per month on gasoline.
She has already purchased $60 in gas this month.
To Find:Which inequality can be used to find the maximum number of fill-ups she can purchase during the rest of the month, assuming each fill-up costs $30
Solution :
Since we are given that she already purchased for $60 in this month
Let now she will purchase n number of fill ups for the rest days of this month.
since cost of each fill up is $30
So, cost of n fill ups is 30 n
So, total she she spent this month = 60+30n
We are also given that she can spend no more than $150 per month.
So, inequality becomes:

Hence , inequality can be used to find the maximum number of fill-ups she can purchase during the rest of the month, assuming each fill-up costs $30:

SO, option B is correct .