Answer: 10.5 miles
Explanation:
Find out how many miles she walks in a day by adding the two fractions together:
+
, you can re-write the second fraction in a non-simplified way by multiplying the denominator (10) by the number 1 and then adding the numerator (4) to that getting you
so we can substitute that in for our second fraction and add them together like this:

so that is how many miles they walk in a day. To get how many miles they walk in 5 days multiply that by 5:

we can simplify the fraction. To do so we see how many times 105 can be divided by 10. Which is 10 times leaving a remainder of 5. So the simplified version would be:

can be simplified down even more (not sure if you need to do this or not):