Answer
$h\leq3.57$
Work Step by Step
The student can work no more than $25$ hours each week. The inequality for a week will be $$ h \leq 25$$ as the student will be able to work any number of hours less than or equal to $25$.
Since there are $7$ days a week, the number of hours the student can work each day can be obtained by diving $25$ by $7$. Hence the equation will be $$d \leq3.57,$$ where $d$ would be the number of hours he would work each day.