Take 9 from 6, 10 from 9, 50 from 40 and leave 6. what is the answer?

A50% increase followed by 33 1/2% decrease

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?

What is the distance between the points (2, 5) and (5,9)?