Question

Last Saturday, Kevin walked his dog 1 2/7 miles. Sam walked his dog 7 times as far. How many miles total did both guys walk their dogs?

Answer 1

`10(2)/(7)\ miles`

Explanation:

If Kevin walked his dog 1 2/7 miles and Sam walked his dog 7 times as far, then Sam walked his dog

`1(2)/(7)\cdot 7=(1\cdot 7+2)/(7)\cdot 7=(9)/(7)\cdot (7)/(1)=9\ miles.`

Together they walked

`1(2)/(7)+9=10(2)/(7)\ miles.`