Answer:
The expression for the Total Cost for Ordering n lunches is
.
Total Cost to deliver 5 lunches is $23.75.
Explanation:
Given:
Cost of each lunch delivery = $6.25
One time delivery fee = $3.50
Let number of lunches to be delivered be 'n'.
We need to find the expression for the cost of ordering n lunches.
Hence we can say that;
Total Cost for Ordering n lunches is equal to sum of One time delivery fee and Cost of each lunch delivery multiplied by number of lunches to be delivered.
Framing in equation form we get;
Total Cost for Ordering n lunches =

Hence The expression for the Total Cost for Ordering n lunches is
.
Now Given:
Number of lunches to be delivered = 5
We need to find the Total Cost for delivering.
Substituting the value of n =5 in above expression we get;
Total Cost for delivering =

Hence Total Cost to deliver 5 lunches is $23.75.