Then a is Half of 45 wich is 22.5 I believe.
Yes due to the fact that additive inverse is the oppsite. so she runs up +4 and runs down -4.
Given:
The length of field is n yards.
The length of a field in feet is a function f(n).
To find:
The function rule for this situation.
Solution:
We know that,
1 yard = 3 feet
Using this conversion, we get
n yard = 3n feet
The length of field is n yards. So, the length of the field is 3n feets.
The length of a field in feet is a function f(n). So,

Therefore, the required function rule for this situation is
.
T=2A+4
S=5A-8
If Tom and Sara are 10 years old,
10=2A+4
6=2A
3=A
Not sure though