Answer:
3
Step-by-step explanation:
S=saving
X=amount left
S-55=x
Another way : x=s-55
Step-by-step explanation:
You can use the Pick's theorem:

where
<em>i</em><em> - number of lattice points in the interior located in the polygon</em>
<em>b</em><em> - number of lattice points on the boundary placed on the polygon's perimeter</em>
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Answer: I believe the answer is 9 days.
Step-by-step explanation: 16 divided by 1.75 (1 and three-fourths) is equal to 9.143, which is only enough to feed him 9 full days.