Answer:
4 MPH
Step-by-step explanation:
If you ran 1 1/2 miles in 20 minutes than in an hour you have ran 4 1/2 miles
Do like this
(y - 1)(y² + 2y + 1)
y³ + 2y² + y - y² - 2y² - 1
y³ - 1
This is end result
