Mary ran at a steady speed in a 10-mile race. Her finish time was 2 hours. Mary can bike the same distance in
hour. Mary wants to know her running speed and biking speed in miles per hour.
Which fraction represents Mary's running
speed in miles per hour?
1/2/10, 1/2, 10/2, or 10/1/2?

We want to get Mary's running speed and biking speed. We will get that her running speed is 5 mi/h, while her biking speed is 10 mi/h.

First, you need to remember that speed is defined as the rate at which the position changes with respect to the time.

Then we can write:

When she runs, she completes a distance of 10 miles in a time of 2 hours, then her running speed is:

When she bikes, she completes that distance in 1 hour, then her biking speed is:

If you want to learn more about speed, you can read:

link

i'm not sure i quite understand, could you provide more information?

step-by-step explanation: