If you add 3x^4 − 7x^3 + 12x − 9 to . The sum will NOT be closed because are not and by definition the sum will NOT be a polynomial.

The speed of a falling object increases at a constant rate as time increases since the object was dropped. which graph could represent the relationship betweent time in seconds, and s, speed in meters per second? speed of a falling object object over time

Anyone know? is appreciated! will mark brainliest if correct!

Select the graph of the solution. click until the correct graph appears. |x| = 3