We have,

Introduce variable
such that 
The sum
is therefore 
So,
(sadia's age)
(father's age)
Hope this helps :)
Answer:
38.0
Step-by-step explanation:
first you divide then times
Answer:
.188 pounds per day
Step-by-step explanation:
Given
- 35 pounds gained in 186 days
<u>Divide the amount of pounds gained by the total number of days</u>
35/186 = .188
<u>Answer</u>
Approximately .188 pounds per day.
The answer is 9.05538513814