At the coordinate point (0, 6), if x is days and y is dollars, we can tell that 0 days is 6 dollars. That's the fixed fee. $6.
To determine the result of the product of the polynomials, we will use the distributive property:

Using the distributive property, we get:

Simplifying the above result, we get:

Finally, adding like terms we get:

Answer:
Answer: 16 miles
Explanation:
I believe it would be 16 miles, if he starts off at 6 miles on day one and goes up 1/2 mile every day, he would be up a mile every other day, basically on day 3 he would be at 7 and day 5 at 8 miles, if the pattern continues he would be at 16 miles by day 21.