Answer:

Step-by-step explanation:
Consider the given differential equation is



Taking all variables on right sides.


Let as assume,
and 
Find partial derivatives
and 
and 
Since
, therefore the given differential equation is exact.
The solution of the exact differential equation is






Answer:
0.05 I hope that's correct:)
Answer: disagree its backwards
Step-by-step explanation: the x intercept always comes first so its actually (-4,2)
Answer: $18.90
Step-by-step explanation:
speed is 45 miles per hour. 135/45=3, so the answer is 3hours (A)