ANSWER:
The answer would be C. 54/7
EXPLANATION:
Multiply 9* 6/7 = 9x6/1x7 = 54/7
Multiply both nominators and denominators
Result to keeping the lowest possible denominator GCD(54, 7).
GCD - 54 / 1 = 53
7 / 1 = 7
Let's expand the products they are all in the form

For the first one we have a=x and b=2i:

For the second one we have a=x-2 and b=2i:

For the third one we have a=x+1 and b=i:

Answer:
10.5 miles.
Step-by-step explanation:
If she walks 7/10 of a mile each morning, and 1, 4/10 of a mile each day, Belle walks a total of 2 1/10 of a mile each day (2.1) miles each day)
We can just multiply the amount of miles per day by 5, (2.1 x 5) and we get 10.5 miles total.