Answer:
A?????
Step-by-step explanation:
I honestly don't know if it's right
Answer:
pairs
Step-by-step explanation:
Given
Profit on selling 'x' pairs of shoes is 
Find the derivative of the function to find out the critical points

Thus, for 4 pair of shoes profit is maximize.
Answer:
1.25 meters
HOPE THIS HELPS
-Todo ❤️
Step-by-step explanation:
.5*2.5=1.25
Answer:
-3mn
Step-by-step explanation:
It seems you might be missing some of the question, as you haven't given what m and n are equal to.
If the question has just given you x, then you would simply just simplify it to get -3mn.
Answer:
90 cubic inches
Step-by-step explanation: