What i got was 16.8. I'm not sure if it is the right answer, but I tried
Answer: 
Step-by-step explanation:

Answer:
3.75 + 0.15n ≤ 5.25
Step-by-step explanation:
You can not spend more than $5.25 so the inequality sign must be less than or equal to
If you know the shop charges a minimum of $3.75 for a sandwich, you need to include that in your equation
The $0.15 for additional toppings is included as $0.15 multiplied by n (0.15n)
n can be from 0-10, as 10 is the most toppings you can get before you go over your spending limit and you don't have to pay for additional toppings if you don't want to.
Answer:
42.5 feet long.
Step-by-step explanation:
Assuming the shape of the garden is a sqaure, than
170/4=42.5 feet long.