Answer:

Step-by-step explanation:
it's simple my dear friend.
first, she runs 3 miles per week.
so in

b is 3. the initial value.
increasement by 20% means she runs 1.2 times than before.

then a=1.2
so we have now:

and we got it!
Answer:
8.8k + 2.2
Step-by-step explanation:
The answer is 12.1, add both 4.5 and 7.6 and you get 12.1
Answer:
All it requires is a good pair of sneakers—no cables, stylish outfits, or weights required