Answer:
The algebraic expression which describes this situation is:

Explanation:
It is given that:
John has $305, and he is spending $3 each day.
This means that : each day his saving are decreasing by $ 3
Hence, at the end of first day he will be left with:

At the end of the second day he will be left with:
![$ [(305-3)-3]=$ (305-3* 2)](https://img.qammunity.org/2018/formulas/mathematics/high-school/xgrf94hda85csn17os5rip13vdte2emsdi.png)
Similarly at the end of the third day he will be left with:

Hence, for the d days he will have:
