Multiply or divide normally. Whenever the signs are different it’s always gonna be a negative.
Step-by-step explanation:
A. a numerical expression I am pretty sure
It's a quadratic so the parent function will be

We can see that it has been shifted to the right 5 units, which gives us a new function

It has also been shifted up 9 units:

But it has also been flipped across the y-axis which makes this the final change we need to do:
18-4.25=13.75$ she has. 13.75-9.75=4$ she can spend. 4$/0.50=8 packages she can buy