To express the number of days it will take Olivia to finish painting the fence, we need to know how many planks she paints each day. Let's say she paints \( p \) planks each day.
The total number of planks is 750.
The expression for the number of days \( d \) it will take Olivia to finish painting the fence can be represented as:
\[ d = \frac{750}{p} \]
Where:
- \( d \) is the number of days it will take to finish painting the fence,
- 750 is the total number of planks, and
- \( p \) is the number of planks Olivia paints each day.
So, once we know the value of \( p \), we can plug it into the expression to find \( d \).