Answer:
For the given functions f(x) and g(x) 
Step-by-step explanation:
Here, the given function are:

Now, simplifying for (f-g)(x) = f(x) - g(x):


Doing operation on LIKE TERMS, we get
f(x) - g(x) = 
Hence, for the given functions f(x) and g(x) 
If it is 5ft a minute then it must be 10ft every two minutes
15x plus 7
This is because you just simplify the like terms
2.5x1.30=3.25
4x4.50=18
2x3.75=7.5
3.25+18+7.5=$28.75 total price
2.5+4+2=8.5lb. total weight
28.75/8.5= 3.38 dollars per pound.