Answer:
<h2>3Q + 2p</h2>
Step-by-step explanation:

So its 2$ per guest since
20$/10 guests
2$/1 guest
and if she has 48$ its
48$/24 guests
So she can have 24 guests max if she spends 48$
I would first subtract 7 from 34 then divide by negative 3 and get -9