67.9k views
4 votes
Marina can bicycle 19.5 miles in the same time it takes her to run 6 miles. She bikes 9 miles per hour faster than she runs. At what speed does Marina run?

2 Answers

3 votes

Answer:

A on edge

Explanation:

User Bryan McLemore
by
8.0k points
6 votes
To answer the question, let x be Marina's speed running. With this representation, Marina's speed biking is x + 9. Time is calculated by dividing distance by time.
19.5 / (x + 9) = 6 / x
The value of x is approximately 4. . Therefore, Marina can run at a speed of 4 miles per hour.
User Volker Voecking
by
8.3k points