Find the length of side x in simplest radical form with a rational denominator

The water has been on the stove y=9.5x+62.1 after how many minutes will the tempature be 138.1 f

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?

Find the average rate of change for the given function drom x=1 to x=2