Answer:
The question is not fully visible but what u want to do is group them subtract/add what u can and then factor it out
Step-by-step explanation:
Answer: The number of hours is the independent variable
Explanation: The number of miles depends on the number of hours.
Then, miles -> depentend variable, hours -> independent variable
3 - x = x³ + x
3 - x - x³ - x = 0
-x³ - 2x + 3 = 0
x = (-b - √(b² - 4ac))/2a
x = (-(-2) - √((-2)² - 4(-1)(3))/2(-1)
x = 1