You multiply by the conjugate to both the denominator and numerator.
After that you can simplify by canceling the 4 and then you are able to simplify the (h) as well.
ANSWER
50 food items
EXPLANATION
Tanya does not want to spend more than $250
The ticket costs $50 and each food item costs $4.
Let the number of items that can be bought be x.
So, the inequality that represents this situation is:

Now, let us solve it:

Tanya can buy not more than 50 items.