I need help understanding this and how to do it :)
2 answers:
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Answer:
A.The expression represents the price paid
B. ; everything means the same thing as the first.
Step-by-step explanation:
For a. we can tell what the expression means by re-reading the problem. We know that the 15 is the price per goby fish and that 10 is the price per shrimp. Since there is an equal number of each in each bag the x represent the number of goby fish or shrimp in the bag. The answer to the equation will be the price paid. Another expression you could use is the following.
This is an unfactored version of the first on where x is factored out. Here everything means the same thing it's just a different expression.
If 
is conservative, then there is a scalar function 
such that
Setting the first components equal to one another, we can integrate both sides to find
Differentiating both sides with respect to
gives
so that
By the fundamental theorem of calculus, we have that
Setting the first components equal to one another, we can integrate both sides to find
Differentiating both sides with respect to
so that
By the fundamental theorem of calculus, we have that