15-20 is -5. If you put 15 on a number line and go back twenty spaces you land on -5 hope this helps.
The domain of the function is represented by option C. All real numbers.
Given:
The polynomial is:

To find:
The simplified form of the given polynomial in standard form.
Solution:
We have,

Combining the like terms, we get


Now, rewrite this polynomial in standard form.

Therefore, the required polynomial in standard form is
.
Answer:
The average speed of the car is 45.76 mph
Step-by-step explanation:
avg speed = distance / time