anonymous one year ago The Boardman family walked two over five of a mile in two over seven of an hour. What is their unit rate in miles per hour

1. anonymous

two-sevenths over two-fifths equals one and two-fifths miles per hour two-sevenths over two-fifths equals five over seven mile per hour two-fifths over two-sevenths equals one and two-fifths miles per hour two-fifths over two-sevenths equals five over seven mile per hour

2. misty1212

HI!!! $\frac{2}{5}$ of a mile in $\frac{2}{7}$ of an hour

3. misty1212

is that the question?

4. anonymous

yes

5. misty1212

they want you do divide miles by hours $\frac{2}{5}\div\frac{2}{7}$ you know how to do that?

6. anonymous

no, not really. Sorry.

7. misty1212

as the math teachers say "invert and multiply" which means flip the second on and go straight across $\frac{2}{5}\div \frac{2}{7}=\frac{2}{5}\times\frac{7}{2}$

8. misty1212

cancel the twos, gives you $\frac{7}{5}$

9. anonymous

true. But thats not one of my answers.

10. misty1212

maybe they want you to write it as a mixed number, or a decimal

11. misty1212

is $1\tfrac{2}{5}$ a choice?

12. anonymous

yes

13. misty1212

then pick that one!

14. anonymous

So, it would be 2/5 over 2/7 equals 1 and 2/5

15. anonymous

@misty1212