Why do you divide models in the denominator

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?

This graph shows which inequality? a ≤ –3 a > –3 a ≥ –3 a < –3

What are the solutions of the equation x4 + 6x2 + 5 = 0? use u substitution to solve.