Answer:
This should fall under quadratic inequalities and linear programming.
Step-by-step explanation:
The first logical step would ro immediately know that
Whatever they buy must be
[tex] \leqslant 120[/tex]
So from my understanding the inequality is
4.89h + 6.39b [tex]\leqslant 120[/tex]
You could divide through by 4.89 to simplify but then it will not be as accurate due to so many decimals. I hope that helps.