Answer:

Step-by-step explanation:

Factor out 20 from the expression.

Take 20 as common.

Answer:
f(x) is y so the x=16 because 4*4=16
1.3*3=3.90
3.90*35=136.50
136.50 is all you need to provide at least three of the most expensive items.
You still have 13.50 left over
The answer would be a 1425