Write 7/10 as a sum of fractions 2 different ways.

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