The inequality representing the maximum number of gigabytes
Yusuf can use while staying within his budget is
. Since
must be a whole number, Yusuf can use at most 3 gigabytes to stay within his budget.
Let
be the number of gigabytes Yusuf uses. The total cost
is given by the flat cost plus the cost per gigabyte:
Yusuf wants to keep his bill under $75, so the inequality for his budget constraint is:
Substitute the expression for
:
Now, you can solve for
to find the maximum number of gigabytes Yusuf can use while staying within his budget. Subtract 57 from both sides:
Divide both sides by 5:
So, the inequality representing the maximum number of gigabytes
Yusuf can use while staying within his budget is
. Since
must be a whole number, Yusuf can use at most 3 gigabytes to stay within his budget.